Restoration Practitioners Research Articles

Expert preferences on options for biodiversity conservation under climate change

Climate change and other anthropogenic drivers challenge the efficacy of traditional approaches to biodiversity conservation. Moreover, the extent and pace of drivers of change are projected to intensify, making ecological restoration of some ecosystems to historical baselines increasingly untenable. This new reality has sparked debates about what new approaches are needed in restoration and conservation. The individual preferences of experts (e.g., ecologists, land managers and restoration practitioners) strongly influence the debate, which are varied and often diverge from those of non-experts. Despite this strong influence, the role of expert preferences in conservation decisions is underexplored. What little has been published is provocative, suggesting ecologists resist implementing non-traditional or ‘taboo’ management practices, even if they agree they are needed in theory. This paper presents the results of a global survey of experts (n = 692), exploring in detail how experts perceive both traditional and non-traditional options in biodiversity conservation and restoration. Most experts were relatively open to incorporating non-traditional options into conservation. However, there were some apparent tensions, including acceptance that baselines are shifting, but a reluctance to let go of historical baselines as a goal. Although participants in this study were fairly supportive of managing novel ecosystems, non-native species, and more human-centred values in some situations, our research suggests ecologists may be more supportive of ‘cautiously aggressive’ policy, particularly if the policies are associated with additional research to reduce uncertainties.

Liver Glycogen as a Sensitive Indicator of Food Limitation in Delta Smelt

AbstractAssessing habitat quality is a major goal of conservationists and restoration practitioners, but to associate habitat quality with biomarkers of vagile animals, the biomarkers must respond rapidly. Here, we identified a biomarker capable of rapidly detecting food limitation in the imperiled Delta Smelt (Hypomesus transpacificus), a pelagic fish endemic to the San Francisco Estuary (SFE). We conducted an experiment with fed and unfed treatments of hatchery-raised, sub-adult Delta Smelt that were sampled at 12 time points: 0, 1, 2, 3, 4, 5, 6, 7, 9, 11, 14, and 21 days. We then compared four biomarkers using Day 21 fish: RNA/DNA in liver, triglycerides in liver, glycogen in liver, and glycogen in muscle. Of the liver endpoints, glycogen had the largest difference between treatments at Day 21, so we compared it to muscle glycogen across all time points. Liver glycogen declined by 60% after 1 day of fasting and remained depressed in the fasting treatment across all subsequent time points. Muscle glycogen also responded rapidly, taking only 2 days to decline by 39% in the fasting treatment, but the difference was inconsistent across subsequent time points. When applied to hatchery-released Delta Smelt collected from the SFE, liver glycogen concentrations were less than half that of the fed hatchery fish, consistent with the hypothesis of food limitation in the wild, but also several other potential causes. This study highlights the utility of liver glycogen as an indicator of recent foraging success in Delta Smelt.

What evidence exists on the ecological and physical effects of built structures in shallow, tropical coral reefs? A systematic map protocol

BackgroundShallow, tropical coral reefs face compounding threats from habitat degradation due to coastal development and pollution, impacts from storms and sea-level rise, and pulse disturbances like blast fishing, mining, dredging, and ship groundings that reduce coral reefs’ height and variability. One approach toward restoring coral reef structure from these threats is deploying built structures. Built structures range from engineered modules and repurposed materials to underwater sculptures and intentionally placed natural rocks. Restoration practitioners and coastal managers increasingly consider incorporating built structures, including nature-based solutions, into coral reef-related applications. Yet, synthesized evidence on the ecological and physical performance of built structure interventions across a variety of contexts (e.g., restoration, coastal protection, mitigation, tourism) is not readily available to guide decisions. To help inform management decisions, here we aim to document the global evidence base on the ecological and physical performance of built structures in shallow (≤ 30 m) tropical (35° N to 35° S latitude) coral ecosystems. The collated evidence base on use cases and associated ecological and physical outcomes of built structure interventions can help inform future consideration of built structures in reef restoration design, siting, and implementation.MethodTo discover evidence on the performance of built structures in coral reef-related applications, such as restoration, mitigation, and coastal protection, primary literature will be searched across indexing platforms, bibliographic databases, open discovery citation indexes, a web-based search engine, a novel literature discovery tool, and organizational websites. The geographic scope of the search is global, and there is no limitation to temporal scope. Primary literature will be screened first at the level of title and abstract and then at the full text level against defined eligibility criteria for the population, intervention, study type, and outcomes of interest. Metadata will be extracted from studies that pass both screening levels. The resulting data will be analyzed to determine the distribution and abundance of evidence. Results will be made publicly available and reported in a systematic map that includes a narrative description, identifies evidence clusters and gaps, and outlines future research directions on the use of built structures in coral reef-related applications.

Citizen science benefits coral reefs and community members alike

The field of coral gardening and active restoration has expanded rapidly over the past 2 decades in response to the rapid, global decline of coral reefs. Even with this expansion, the long-term success of coral restoration and ecosystem recovery will still depend on social action to mitigate the local and global stressors plaguing reefs. Rescue a Reef (RAR), a citizen science program, was designed to engage community members and catalyze action through hands-on, experiential opportunities as coral gardeners and restoration practitioners alongside trained scientists. While community-based coral restoration programs can be a powerful platform for education and increase project success, few programs utilize citizen science and even fewer measure and evaluate the long-term impacts of these activities. Here, we describe the benefits of citizen science for coral conservation identified through a mixed methods longitudinal evaluation of RAR after 8 years of citizen science programming. A survey was distributed to all program participants and responses were compared to historical pre-post survey responses of citizen scientists as well as to a control group. We found that despite the passing of time, citizen scientists largely retained their knowledge levels on coral reef-related topics and were significantly more knowledgeable on the topics than a control group. Additionally, RAR successfully developed a strong sense of community, coral stewardship, and program support among its participants. Most importantly, citizen science has the potential to act as a vehicle for positive social change with the majority of participants reporting changes in perceptions (70.5%) and behavior (60.1%) because of their participation in RAR. Thus, the untapped potential of citizen science as a tool for coral reef conservation, restoration, and stewardship must be realized. Furthermore, citizen science projects must embed evaluation in their activities to gather information and evidence on the effectiveness of their activities as well as potential areas for improvement.

Determining mussel restoration success: An Australasian case study

Restoration is becoming an increasingly common management tool to aid in recovering degraded, damaged, or destroyed ecosystems. Developing and adopting best practices are valuable for maximising restoration efficiency. This frequently includes using natural reference sites to guide restoration goals and target setting, as well as assessing restoration success. Natural reference sites are representative of an ecosystem that has not experienced intense degradation and provides a basis for the conditions that restoration is aspiring to achieve. However, in the instance of mussel reefs, historical overharvesting and habitat degradation have led to a widespread decline in natural reefs, with few natural sites remaining. While mussel restoration is receiving increased efforts, the absence of reference conditions has resulted in many projects lacking clearly defined and achievable restoration goals. This study aims to improve the efficiency of mussel restoration by developing example restoration goals and a theoretical reference system. A broad range of restoration goals are proposed in line with associated ecosystem services, which restoration practitioners can adapt and apply depending on specific project objectives. A dynamic theoretical reference system for mussel restoration is also developed using knowledge of past reefs, observations from remaining reefs, and anticipated future conditions. Two case studies of the application of restoration goals and the theoretical reference system are provided for mussel restoration projects within New Zealand and Australia. This research provides guidance for restoration practitioners to effectively plan and assess progress of restoration, in line with project goals and targets.

Reestablishment best practices for Hymenocallis coronaria: a charismatic flowering macrophyte and indicator species for fall line stream restoration in the southeastern U.S.A.

Charismatic indicator species, which are defined by their sensitivity to ecosystem degradation and attractive traits, are often reintroduced or monitored in restoration projects to evaluate whether desired ecosystem structure and function has been restored and to attract public support for restoration projects. Hymenocallis coronaria is a charismatic and imperiled aquatic plant endemic to southeast U.S. fall line streams. Known for its blooms and sensitivity to flow modification, it provides an opportunity to incorporate the reintroduction of a charismatic indicator species into stream restoration projects. The goal of our research was to provide restoration practitioners with experimentally derived H. coronaria reestablishment best practices by investigating the effects of life stage and outplanting technique on establishment success, with additional considerations given to treatment efficiency. We used binomial generalized linear models to analyze H. coronaria establishment from experimental reestablishment efforts in a free‐flowing segment of Stevens Creek, South Carolina. Model selection showed a strong interaction effect between life stage and outplanting technique and that technique is more important than life stage. Interpretation of our top model indicated that the wedge technique was the most successful and that wedging spring bulbs was significantly more successful than wedging other life stages. However, we recommend that practitioners wedge seedlings or broadcast seeds into existing shoal crevices because of efficiency. Our best practices reflect the need to align reestablishment efforts with H. coronaria's life history to maximize efficiency and suggest that H. coronaria has utility as an indicator species for restored flow regimes of southeast U.S. fall line streams.

Lessons learned from over thirty years of eelgrass restoration on the US West Coast

AbstractSeagrass habitats, which provide essential ecosystem functions such as water quality improvement, biodiversity support, ocean acidification amelioration, and sediment carbon storage, are declining worldwide. Eelgrass (Zostera marina) habitats along the contiguous US West Coast are threatened by conflicting human uses and global change, resulting in significant protections of and efforts to restore areas where habitat is extant or degraded. Despite a history of eelgrass restoration in this region spanning nearly 60 years, very little work has been published on the subject. Here, we review all available literature on eelgrass restoration projects conducted in California, Oregon, and Washington. Of the 82 restoration projects included in this analysis, which were conducted from 1989 to 2020, only 6 were published in peer‐reviewed journals. Thus, despite the precedent for conducting restoration, a lack of data availability makes assessing regional success, drivers of failure, and best practices extremely difficult. From this synthesis, we find that the majority of restoration projects (73%) have been conducted for mitigation (compliance) purposes, contributing to the lack of peer‐reviewed literature on the subject. We find that while eelgrass mitigation policies serve to maintain eelgrass structure and regional acreages, they do not facilitate assessments of habitat function or incentivize advancements in regional best practices. We also find that when we could evaluate project outcomes, 32.3%–59.6% of restoration plots were unsuccessful by the end of the project, but this percentage is highly dependent on how success is defined. According to restoration practitioners, failure was likely to result from environmental factors such as light, nutrients, or macroalgal blooms, but was occasionally due to logistical factors such as restoration method or approach. From this work, we recommend a standardized, evidence‐based approach to restoration, improved data sharing practices, and careful consideration of existing eelgrass mitigation practices. As marine habitat restoration enters a new global stage, backed by public and private investment, burgeoning carbon markets, and global biodiversity initiatives, it is essential to learn from past work to understand and improve seagrass conservation and restoration success.

Role of Seed Banks in Supporting Ecosystem and Biodiversity Conservation and Restoration

The world is witnessing massive land degradation caused by climate change and various anthropogenic activities. There has been a significant increase in habitat restoration efforts, with demand for seeds to restore these degraded ecosystems in some cases outstripping supply. Traditionally, seeds for restoration activities have mainly been sourced through collections from the wild, but with the growing seed demand, this is increasingly becoming unsustainable. In order to ensure responsible restoration practice, restoration practitioners need to explore other options of economical, ethical and sustainable sourcing of seeds. Ex situ seed banks can leverage their technical and infrastructural capacity to play a greater and more direct role in supporting biodiversity and ecosystem conservation and restoration, particularly through the supply of quality ecologically and genetically suitable seed. In this paper, we review whether ex situ seed banks possess the capacity and competence for supporting habitat restoration and the challenges they are likely to face in these efforts. The review focuses on seed collecting, field-based seed bulking, seed handling and storage, seed quality control as well as experience and capacity in facilitating germplasm exchange. The availability of high-quality germplasm collections of documented provenance and with broad genetic diversity is arguably the greatest resource and asset that seed banks have in supporting habitat restoration.

Interacting ecological filters influence success and functional composition in restored plant communities over time.

A trait-based community assembly framework has great potential to direct ecological restoration, but uncertainty over how traits and environmental factors interact to influence community composition over time limits the widespread application of this approach. In this study, we examined how the composition of seed mixes and environment (north- vs. south-facing slope aspect) influence functional composition and native plant cover over time in restored grassland and shrubland communities. Variation in native cover over 4 years was primarily driven by species mix, slope aspect, and a species mix by year interaction rather than an interaction between species mix and slope aspect as predicted. Although native cover was higher on wetter, north-facing slopes for most of the study, south-facing slopes achieved a similar cover (65%-70%) by year 4. While community-weighted mean (CWM) values generally became more resource conservative over time, we found shifts in particular traits across community types and habitats. For example, CWM for specific leaf area increased over time in grassland mixes. Belowground, CWM for root mass fraction increased while CWM for specific root length decreased across all seed mixes. Multivariate functional dispersion remained high in shrub-containing mixes throughout the study, which could enhance invasion resistance and recovery following disturbance. Functional diversity and species richness were initially higher in drier, south-facing slopes compared to north-facing slopes, but these metrics were similar across north- and south-facing slopes by the end of the 4-year study. Our finding that different combinations of traits were favored in south- and north-facing slopes and over time demonstrates that trait-based approaches can be used to identify good restoration candidate species and, ultimately, enhance native plant cover across community types and microhabitat. Changing the composition of planting mixes based on traits could be a useful strategy for restoration practitioners to match species to specific environmental conditions and may be more informative than using seed mixes based on growth form, as species within functional groups can vary tremendously in leaf and root traits.

Provision of early mussel life stages via macroalgae enhances recruitment and uncovers a novel restoration technique

Mussel reefs have been decimated globally as a result of overharvesting, climate change, invasive species, and disease leading to the proliferation of conservation and restoration initiatives. Achieving and maintaining high recruitment rates is vital to the success of these efforts. Without adequate recruitment degraded areas cannot recover and reefs restored through mussel transplantation will dwindle and eventually disappear. Efforts to enhance recruitment for restoration projects typically prioritize the provision of conspecifics to attract juveniles, relying on the concept that transplanting adult mussels into a degraded environment will improve recruitment. However, the mussel aquaculture industry often pursues a different path to facilitate recruitment to their mussel farms, specifically the provision of wild-caught or hatchery-reared settlement-stage mussels (plantigrades) with the understanding that these plantigrades will then recruit onto substrates in the mussel farm. This technique has clear potential for mussel restoration practitioners seeking to enhance recruitment to a degraded area, however, it is largely untrialled in this context. In this study, a fully-factorial small-scale experiment was conducted to test the provision of adult mussels and plantigrades as techniques to enhance juvenile mussel (Perna canaliculus and Mytilus galloprovincialis) recruitment and growth in Kenepuru Sound, New Zealand, an area with a history of wild mussel overharvesting. After two-months, the provision of plantigrades via settlement-dense macroalgae resulted in a 10-fold increase in recruitment compared to the provision of adult mussels alone, as well as an increase in average juvenile recruit size. Notably, the provision of adult mussels did not enhance overall juvenile recruitment rates, however it did alter recruitment patterns as juveniles preferentially recruited directly onto conspecific adult mussels rather than rocks when provided with both options of substrate in close proximity. These results emphasize the value of healthy macroalgae populations to mussel reef functioning and shed light on a potential bottleneck to recruitment as both macroalgae populations and mussel recruitment rates have declined locally. Ultimately this study highlights the possibility of plantigrade-provision through macroalgae as an efficient recruitment enhancement technique for mussel restoration and emphasizes the importance of both cross-species and life cycle informed restoration.

Exploring the Use of Living Shorelines for Stabilization and Nutrient Mitigation in New England.

As salt marsh habitats face challenges due to sea level rise, storm events, and coastal development, there is an effort to use nature-based approaches such as living shorelines to enhance salt marshes and provide coastal protection. A living shoreline restoration and seasonal monitoring was conducted between July 2016 and October 2018 at an eroding salt marsh on Martha's Vineyard, Massachusetts, Northeastern USA to assess changes in two essential ecosystem services: shoreline stabilization and nitrogen removal. Neither the living shoreline nor unaltered sites demonstrated significant sediment deposition at the marsh edge or on the marsh platform between 2017 and 2018. While we expected nitrogen removal via denitrification to improve at the living shoreline sites over time as abiotic and biotic conditions became more favorable, we found limited support for this hypothesis. We found higher rates of denitrification enzyme activity (DEA) at the living shoreline sites when compared to unaltered sites, but these rates did not increase over time. This study also provides a qualitative assessment of our living shoreline structural integrity through the years, particularly following storm events that greatly challenged our restoration efforts. We demonstrate that living shorelines fortified solely with natural materials may not be the most effective approach to maintain these ecosystem services for Northeastern USA salt marshes exposed to intense northeasterly storms. We suggest the restoration of salt marshes to improve major functions be a priority among managers and restoration practitioners. Initiatives promoting the use of nature-based restoration solution where environmental conditions permit should be encouraged.

A framework to apply trait‐based ecological restoration at large scales

Abstract Upscaling trait‐based restoration to regional levels is necessary as we enter the UN Decade on Ecosystem Restoration. For this, we need to select species that achieve functional targets considering the regional species pool. Here, we present a framework to achieve multiple restoration targets using a regional species pool containing the species available on the market, species unavailable, and species that occur in reference ecosystems. The framework enables optimising functional diversity (FD), recovering FD and composition using reference ecosystems, reducing cost and increasing species diversity in restoration. Additionally, our framework allows the detection of functionally relevant species in the regional pool that are unavailable for restoration on the market. We illustrate our framework with a data set of Brazilian savanna tree communities. It was not possible to optimise FD with the species available on the market. To achieve this target, it would be necessary to use unavailable species from the regional pool. However, with the species available on the market it was possible to obtain communities resistant to fire and to restore functional composition and diversity to levels similar to or greater than those observed in reference ecosystems. Synthesis and applications. Our framework selects species to achieve multiple targets in large‐scale trait‐based restoration initiatives. The framework shows a range of solutions that can be achieved with the regional species pool. That allows the restoration practitioner to verify if functional parameters are truly optimised and which species should be added to the market or collected from the wild to achieve restoration targets. It also shows how different selected communities are from reference ecosystems, avoiding the unintentional creation of novel ecosystems.

Northern Europe's suitability for offshore European flat oyster (Ostrea edulis) habitat restoration: A mechanistic niche modelling approach

Abstract After centuries of overexploitation, European flat oyster (Ostrea edulis) habitats are increasingly being protected and large‐scale oyster habitat restoration projects have been initiated in the North Sea, the English Channel, the Irish Sea and the north‐eastern Atlantic. Understanding the habitat requirements of flat oysters is key in the selection process of restoration sites. In this study, a theoretical niche for all life stages of the flat oyster is determined using a dynamic energy budget model forced with temperature, chlorophyll a and salinity in combination with sediment composition. The suitability of Northern Europe's marine environment for flat oysters is evaluated by applying the proposed niche model on a spatial scale and evaluating spatio‐temporal variability in life history traits and metabolic characteristics, such as fitness, reproductive output, settlement success and growth. Results show that habitat suitability is limited by low maximum summer temperature and low food availability at higher latitudes and in areas under strong influence of the Atlantic Ocean. Restoration efforts in Ireland and Scotland should be confined to protected and shallow coastal environments. Suitability in the southern North Sea is patchy and mainly depends on seabed substrate. The nearshore areas of the English Channel are highly suitable. The georeferenced dataset shared in this study will be useful for restoration practitioners.

Culturing for conservation: the need for timely investments in reef aquaculture

Temperate oyster and tropical coral reefs are analogous systems that create habitat for economically, ecologically, and culturally important species, and they provide countless ecosystem services to human coastal communities. Globally, reefs are imperiled by multiple anthropogenic stressors, particularly climate impacts. Using aquaculture to support conservation goals - known as conservation aquaculture - is a relatively new approach for many reef building species, but it shows great promise for promoting species recovery and bolstering resilience to stressors. Concerns about aquaculture-associated risks, both known and potential, have often restricted the implementation of this tool to an emergency intervention following dramatic declines on reefs, when species or systems were unlikely to recover. Here, we combine expertise from coral and oyster reef ecosystems to consider the role of aquaculture as a conservation intervention for reefs, and provide recommendations for its timely development and targeted implementation. We highlight the importance of evaluating reef systems - alongside local stakeholders and Indigenous communities - to determine where and when the benefits of using aquaculture are most likely to outweigh the risks. We spotlight the importance of proactive monitoring to detect reef population declines, and the value of early aquaculture interventions to increase efficacy. Novel aquaculture approaches and technologies specifically designed for reef builders are considered, including techniques for building complex, multi-generational and multi-species reefs. We address the need for scaling up aquaculture-assisted reef recovery, particularly of corals, using high volume methods like those that have been successfully employed for oysters. We also recommend the immediate assessment and development of techniques to increase climate resilience of reef builders and we identify the challenges and trade-offs of these approaches. We highlight the use of proof-of-concept projects to test these promising methods, and we advise tracking of all interventions over time to determine their long-term efficacy. Finally, we outline opportunities to leverage novel partnerships among conservation, industry, and community interests that utilize aquaculture to facilitate the conservation of reefs. Developing conservation aquaculture approaches now is critical to position managers, scientists, and restoration practitioners to implement this intervention in timely and effective ways to support resilient reef and human communities worldwide.

Age, experience, social goals, and engagement with research scientists may promote innovation in ecological restoration.

Innovation in ecological restoration is necessary to achieve the ambitious targets established in United Nations conventions and other global restoration initiatives. Innovation is also crucial for navigating uncertainties in repairing and restoring ecosystems, and thus practitioners often develop innovations at project design and implementation stages. However, innovation in ecological restoration can be hindered by many factors (e.g., time and budget constraints, and project complexity). Theory and research on innovation has been formally applied in many fields, yet explicit study of innovation in ecological restoration remains nascent. To assess the use of innovation in restoration projects, including its drivers and inhibitors, we conducted a social survey of restoration practitioners in the United States. Specifically, we assessed relationships between project-based innovation and traits of the individual practitioner (including, for example, age, gender, experience); company (including, for example, company size and company's inclusion of social goals); project (including, for example, complexity and uncertainty); and project outcomes (such as completing the project on time/on budget and personal satisfaction with the work). We found positive relationships between project-based innovation and practitioner traits (age, gender, experience, engagement with research scientists), one company trait (company's inclusion of social goals in their portfolio), and project traits (project complexity and length). In contrast, two practitioner traits, risk aversion and the use of industry-specific information, were negatively related to project-based innovation. Satisfaction with project outcomes was positively correlated with project-based innovation. Collectively, the results provide insights into the drivers and inhibitors of innovation in restoration and suggest opportunities for research and application.

Speaking the same language: Aligning project designations to clarify communication in restoration ecology

As we enter the United Nations Decade of Ecosystem Restoration, the need to engage in restoration activities has never been greater. Included within this need is a requirement for clear communication between researchers, practitioners, policymakers, stakeholders, and community members. To facilitate the discussion and assessment of restorative activities, we propose two decision trees to differentiate between key restoration terms (Reclamation, Rehabilitation, Ecological Restoration, Rewilding, Landscape Restoration, Intra-Ecosystem Restoration, Reference Condition Restoration, and Ecological Reclamation) and to clarify how they relate to each other, based upon project scope and desired/intended project outcomes. Continued use of unclear terminology impedes practitioners or researchers from using the literature efficiently, to find precedents that could assist their current efforts. As such, increasing clarity of communications will ensure restoration is discussed within a framework of well-defined and agreed upon terms. It is our hope that this suggested framework will contribute to the ongoing and much needed terminology debate and help enhance cohesion on the use of key terms within the restoration focused literature. Given the increased focus upon restoration projects of any kind, especially during the UN's decade of ecosystem restoration, it is more important than ever that restoration practitioners speak the same language.

Assessing long-term outcomes of tidal restoration in New England salt marshes

Salt marshes are valuable coastal ecosystems, but many have been degraded by roads, railways, and other infrastructure that restrict tidal flow and impound watershed runoff. Restoration of tidal flow to tide-restricted salt marshes generally aims to restore native vegetation and habitat functions. Biological communities may take one or more decades to recover following tidal restoration, but outcomes are seldom assessed on that timescale. We assessed the long-term outcomes of eight tidal restorations in Rhode Island, USA using observed changes in plant and nekton communities from pre-restoration to present, and newly-collected data from a rapid assessment method. The time-series vegetation and nekton data suggest that while restoration actions promoted biological recovery, ambient factors such as inundation stress and eutrophication have worked to offset it. Rapid assessment results indicate that the cover of Phragmites australis is higher and the cover of meadow high marsh is lower at restoration marshes compared with a broad reference sample, suggesting incomplete recovery on average, although outcomes varied across the restoration marshes. Habitat integrity increased with the degree of adaptive management following restoration, as well as the age of restoration, but salt marsh restoration practitioners may need to shift their methods and expectations to accommodate human influences on ambient environmental conditions, particularly prevalent, increasing inundation stress associated with sea-level rise. Our study highlights the value of standardized long-term biological monitoring in assessing salt marsh restoration outcomes, and demonstrates how rapid assessment data can add valuable context to restoration findings.

Acropora CervicornisData Coordination Hub, an Open Access Database for Evaluating Genet Performance

Once one of the predominant reef-building corals in the region,Acropora cervicornisis now a focal species of coral restoration efforts in Florida and the western Caribbean. Scientists and restoration practitioners have been independently collecting phenotypic data on genets ofA. cervicornisgrown in restoration nurseries. While these data are important for understanding the intraspecific response to varying environmental conditions, and thus the potential genetic contribution to phenotypic variation, in isolation these observations are of limited use for large-scale, multi- institution restoration efforts that are becoming increasingly necessary. Here, we present theAcropora cervicornisData Coordination Hub, a web-accessible relational database to align disparate datasets to compare genet-specific performance. In this data descriptor, we release data for 248 genets evaluated across 38 separate traits. We present a framework to align datasets with the ultimate goal of facilitating informed, data-driven restoration throughout the Caribbean.

Seed type and origin-dependent seedling emergence patterns in Danthonia californica, a species commonly used in grassland restoration.

Danthonia californica Bolander (Poaceae)is a native perennial bunchgrass commonly used in the restoration of prairie ecosystems in the western United States. Plants of this species simultaneously produce both chasmogamous (potentially outcrossed) and cleistogamous (obligately self-fertilized) seeds. Restoration practitioners almost exclusively use chasmogamous seeds for outplanting, which are predicted to perform better in novel environments due to their greater genetic diversity. Meanwhile, cleistogamous seeds may exhibit greater local adaptation to the conditions in which the maternal plant exists. We performed a common garden experiment at two sites in the Willamette Valley, Oregon, to assess the influence of seed type and source population (eight populations from a latitudinal gradient) on seedling emergence and found no evidence of local adaptation for either seed type. Cleistogamous seeds outperformed chasmogamous seeds, regardless of whether seeds were sourced directly from the common gardens (local seeds) or other populations (nonlocal seeds). Furthermore, average seed weight had a strong positive effect on seedling emergence, despite the fact that chasmogamous seeds had significantly greater mass than cleistogamous seeds. At one common garden, we observed that seeds of both types sourced from north of our planting site performed significantly better than local or southern-sourced seeds. We also found a significant seed type and distance-dependent interaction, with cleistogamous seedling emergence peaking approximately 125 km from the garden. These results suggest that cleistogamous seeds should be considered for greater use in D. californica restoration.

The role of dominant prairie species ecotypes on plant diversity patterns of restored grasslands across a rainfall gradient in the US Great Plains

AbstractQuestionsA robust ecosystem requires a functionally heterogeneous community of organisms with ecological traits that permit broad resource partitioning. Understanding community diversity patterns can help investigate drivers of community assembly and assess restoration success. Do biodiversity patterns differ among grassland communities sown with different ecotypes of dominant species during restoration along a rainfall gradient in the tallgrass prairie of the central US Great Plains?LocationFour field sites across a rainfall gradient within the North American Great Plains: Colby, Kansas (39°23′17.8″N, 101°04′57.4″W), Hays, Kansas (38°51′13.2″N, 99°19′08.6″W), Manhattan, Kansas (39°08′22.3″N, 96°38′23.3″W), and Carbondale, Illinois (IL, 37°41′47.0″N, 89°14′19.2″W).MethodsWe applied linear mixed models to assess the effect of dominant species ecotype, year, and location on grassland taxonomic, phylogenetic, and functional diversity.ResultsThe non‐local grass ecotype (compared to the local ecotype) promoted species richness. In contrast, the effect of the dominant species ecotype on phylogenetic or functional diversity was site‐specific over the 10‐year restoration. Richness decreased across the rainfall gradient from dry to moist sites, and the wettest site had the highest phylogenetic and functional diversity.ConclusionsOur results suggest that abiotic filtering by rainfall is a key assembly mechanism that could predict grassland changes in biodiversity in the early restoration phases. Given the community response across the tallgrass prairie, restoration practitioners should consider the impact of regional sources of dominant species used in restoration when biodiversity is a restoration goal. It is recommended for future grassland restoration to detect gaps and limitations in evolutionary and trait structure that will reveal which diversity components to evaluate.