Conservation Goals Research Articles

An integrated population model and sensitivity assessment for a data poor population of green sturgeon

Conservation planning requires understanding population sizes and trajectories. As with many imperiled species, green sturgeon (Acipenser medirostris) census data are limited, making it difficult to contextualize current threats and promote quantitative conservation goals. We combined spawning census, growth, and demographic data for the southern population of green sturgeon to build a population size and trajectory estimate. We generated a distribution of population size estimates and trajectories reflecting uncertainty from multiple sources. We then propagate these estimates through a demographic model to assess the potential impact of fishing bycatch. Our model suggests the population is below the recovery goal of 3,000 adults. The most probable current total population estimate (including juveniles) is approximately 10,000 fish (5,300-18,400 95% HDI), with 2,400 adults (2197-2624 95% HDI). Simulated fishing bycatch pressure on the adults and subadults reduced abundance by a median value of 0.4% per year, which could be an impediment to recovery. Fisheries bycatch is one of many threats this population faces; this integrated framework may be used to assess how other threats may affect this population.

How Governance Can Contribute to Amazon Biome Conservation?

Forest conservation has transcended environmental concerns and become a determining factor in global social and economic issues. Therefore, setting forest conservation goals, including recovery and/or reforestation, is critical to help mitigate global warming and climate change. Although Amazonian countries have forestry policies for forest conservation, the forest continues to be degraded. The aim of this article is to suggest a regional governance model for the nine countries that share the Amazon rainforest. The thesis of the paper is that the definition of a common legal basis for the nine countries can contribute to forest conservation. Through qualitative analysis of exploratory and descriptive variables, the main topics related to the proposal of a governance model were identified. Multi-level governance contributes to the environmental conservation process by creating an environment to engage local, national, and international stakeholders from diverse groups. As a result of this paper, we suggest the creation of a supranational governance, composed and regulated by each of the nine countries of the Amazon biome and having as reference the AFR100 initiative. The proposition and creation of governance among Amazonian countries are fundamental for achieving the objectives for the conservation of the biome; such governance must take into account existing public policies, institutional mechanisms, and financial commitments. Although the Amazon countries present a framework of policies and commitments that seek to preserve the biome, the reality is that forest degradation through deforestation with negative effects on the climate and on the communities that depend on the standing forest still exists.

Nigerian Land Resources and Conservation Strategies: A Critical Analysis of Economic and Non-Economic Issues

Land is an indispensable resource for all of man’s activities, and being an asset with zero elasticity in its physical supply requires adequate sustainability and conservation. Over the years, various strategies have been generated and adopted to ensure conservative management of land resources. This paper examines Nigerian land resources and conservation strategies, critically analyzing the economic and non-economic issues. Land resources conservation in Nigeria indulges economic issues from agriculture, urbanization and industrialization which affect the availability and accessibility of land for various uses, while the non-economic issues from cultural, social and environmental factors and policies are basically concerned with the determination and control of the use of land resources. These have to be considered with emanating challenges and surmounted to ensure land resources conservation for sustainability considering future generations. Policymakers, researchers and stakeholders in the environmental field have to work and operate in synergy, evaluating workable and favourable conservation strategies: balancing economic and non-economic land related issues to achieve overcoming emanating issues, thereby sustaining the goal of Land resources conservation in Nigeria.

Research on the Driving Factors for the Application of Energy Performance Contracting in Public Institutions

Building energy efficiency in public institutions is crucial for achieving energy conservation and emissions reduction goals. The application of energy performance contracting (EPC) can effectively reduce energy consumption in these buildings and promote the development of the energy-saving service industry. However, there is a lack of initiative among public institutions to adopt EPC. This study aims to investigate the factors that drive the intention and behavior of public institutions to apply EPC and enhance their proactive engagement in building energy efficiency retrofitting. By considering the current status of EPC application in public institutions and drawing on relevant decision-making and behavioral theories, this paper identifies the key factors that drive the intention and behavior of public institutions, and constructs a theoretical model of the intentional and behavioral driving factors. In the empirical testing phase, research data are collected through online questionnaires. Structural equation modeling is employed to validate and analyze the extent of the driving factors and their interrelationships. The key findings are that (1) perceived usefulness, trust, and perceived risk significantly drive the behavior intention of public institutions to apply EPC; (2) perceived behavioral control and perceived ease of use significantly positively drive the behavior of public institutions, with behavior intention being the most influential factor; and (3) policy system and organizational support play a significant moderating role in the process from intention to behavior. Based on these findings, this paper proposes the critical tasks and suggests countermeasures for stakeholders in EPC projects.

The impact of habitat loss and fragmentation on biodiversity in global protected areas

Protected areas (PAs) serve as effective means for biodiversity conservation but face threats from habitat loss and fragmentation. Current research on the impact of habitat loss or habitat fragmentation on biodiversity in PAs mostly focuses on individual PA or regional scales. At the global scale, the extent of habitat loss and fragmentation in PAs and their effects on biodiversity remains unclear. Therefore, we investigated the degree of habitat loss and fragmentation in global PAs from 2000 to 2020, analyzed the impact of habitat loss and fragmentation on biodiversity in PAs, identified hotspot PAs of severe habitat loss or fragmentation, and highlighted critically endangered species within these PAs. Our study reveals that, between 2000 and 2020, 19 % of global PAs experienced habitat loss, and 34 % experienced habitat fragmentation, with large PAs and South American tropical PAs exhibiting the most severe levels of habitat loss and fragmentation. The impact of habitat loss and fragmentation on biodiversity was most significant in small PAs and African tropical PAs. There are 10 global hotspot PAs of habitat loss or fragmentation, posing a serious threat to the survival of endangered species within PAs. Biodiversity conservation remains a prominent research focus globally, and the issues of habitat loss and fragmentation in PAs may impact the achievement of the COP15 biodiversity conservation goals. Therefore, this study aims to provide data support and scientific guidance for the management and development of global PAs.

Insights into National Park Governance based on Global Research Trends: A Lesson for Indonesia

National park governance is urgent in preserving the broadness of biodiversity, nature conservation, and supporting the lives of local communities, demanding a sustainable approach based on global knowledge. This research uses bibliometric analysis to get an idea of global research trends on national park governance and take lessons that can be used in Indonesia. This study maximizes the bibliometric analysis approach with Scopus data sources. Analysis tools are also maximized, namely Nvivo 12 Plus and Vosviewer. The main findings of this research indicate that, through global research trends, national park governance needs to be studied in future research. The tendency of use of the term in biodiversity, nature conservation, conservation management, environmental management, and community participation proved this. Understanding this issue helps create possible governance means more effectively and sustainably, which can be an idea for Indonesia. Findings from global research also provide lessons for Indonesia: They tend to encourage adopting the principle, such as adaptive and collaborative governance in addressing these complex challenges. It can flow on the resolution of conflicts, the involvement of local communities, conservation goals, protection for the environment, the empowerment of indigenous communities, policy changes for and participatory bureaucracy, and satisfying local needs and conservation.

Mediation of psychological ownership between green human resources management and nursing faculty's green behavior.

Greening organizations have become a top priority for decision-makers in the 21st century. Psychological ownership can be improved through responsible administration, which, in turn, improves green behavior. Investigating the mediating role of psychological ownership in the relationship between green human resources management (HRM) and green behavior among nursing faculty. A correlational analytical research design was utilized to conduct the study following the STROBE guidelines. A convenience sample of 204 academic staff was used. Four data collection tools were used: sociodemographic characteristics, the green HRM questionnaire, the Psychological Ownership Scale, and the Green Behaviour Scale. Faculty members who perceive strong green HRM practices are more likely to have heightened psychological ownership, positively influencing their engagement in green behavior. Conversely, weaker perceptions of green HRM are associated with lower levels of green behavior. Psychological ownership was found to act as a partial mediator between green HRM and green behavior. Even when considering the influence of psychological ownership, green HRM has a significant and direct impact on green behavior. Faculty members who perceive a high level of green HRM practices are more likely to have a high level of psychological ownership that, in turn, influences their green behavior. Workshops on psychological ownership and green behavior can foster environmental sustainability. Policies should integrate green HRM practices into nursing education and healthcare facilities, recognizing psychological ownership's role. Incentivizing green initiatives can motivate staff, aligning with broader conservation goals. Encouraging an ethos of environmental stewardship benefits both the healthcare and sustainable development agendas.

Preference for hibernacula microclimates varies among 3 bat species susceptible to white-nose syndrome

Abstract North American bat populations have experienced precipitous declines since the introduction of white-nose syndrome (WNS). Evidence that bats have responded to WNS by altering their winter habitat selection has been used to manipulate underground environments and improve winter survival. However, such management practices must be based on local data, which do not exist for all regions. Our goal was to identify determinants of winter habitat use for 3 bat species with varying susceptibility to WNS. To do so, we conducted 188 surveys of 129 potential hibernacula over 3 winters. We found that the range of winter temperatures and presence of water were important for the Little Brown Myotis (Myotis lucifugus) and Tricolored Bat (Perimyotis subflavus), species that are highly susceptible to WNS. Counts of both species were greater in sites with a narrow (<5 °C) temperature range and where streams or water bodies >25 m2 were present. In addition, we found larger groups of Little Brown Myotis in abandoned railroad tunnels than in caves. Winter counts of these species increased over time at 3 railroad tunnels that were surveyed for 3 consecutive winters, whereas populations were extirpated from historically important caves and mines. Counts of Big Brown Bats (Eptesicus fuscus), which are less susceptible to WNS, were also greater in hibernacula with water bodies. However, average winter temperature also helped predict counts of Big Brown Bats. This species had a curvilinear response to temperature, with most bats found at hibernacula with average winter temperatures of 4 to 6 °C, and fewer bats observed at warmer and colder conditions. These data show that focusing solely on historically important hibernacula may fail to achieve conservation goals for the Little Brown Myotis and Tricolored Bat in our region, and suggest that anthropogenic structures can provide habitat for remnant populations of imperiled bat species.

What are the dominant drivers and optimal thresholds for a healthy ecosystem in the Yellow River Basin, China? from a perspective of nonlinear nexus

Identifying the dominant factors influencing ecosystem health and their optimal thresholds is essential for the management and restoration of ecosystems. Most of the works, however, have less detected the importance level of individual factors, especially their changes over time and scale, and rarely determined their threshold effects on ecosystem health (EH), which seriously hinders the formulation of targeted policies for sustainable ecosystem management. To address these research gaps, we present an innovative visualization approach to reveal importance changes in natural and anthropogenic variables and their nonlinear coupling process with EH in the China’s Yellow River Basin (YRB) in the last two decades. Results show that (i) Although the EH in the YRB has improved slightly in the past 20 years, it is still not optimistic and shows distinct spatial heterogeneity. (ii) The impact of human activities on the ecosystem health of the YRB has increased and increasingly plays a decisive role, while that of the natural aspect has decreased recently. Specifically, environmental factors (slope, NDVI, and annual temperature) are the dominant factors affecting the upstream EH. Midstream EH is significantly affected by the synergistic effect of natural and anthropogenic factors, but the importance of the proportion of built-up land is intensified (ranked from 8th to 4th). Anthropogenic factors exert the greatest influence on downstream EH variation, especially for population density whose importance order rising from 7th to 2nd. (iii) By illustrating the nonlinear response curves of EH at multi-scale, the tipping point caused ecosystem deterioration in the YRB is explored and the optimal thresholds of leading factors oriented towards the most effective ecosystem conservation goal are obtained. These results help precisely identify the current health status of YRB's ecosystem, as well as providing a valuable reference for moderate restoration standards and sustainable ecosystem management.

Conserving Freshwater Ecosystems in India: A call to action

Abstract India boasts of a vast freshwater resource network (rivers, wetlands, and groundwater), which has unique ecological, social and economic values associated with it. Despite their importance for both people and biodiversity, its freshwater ecosystems (FWEs) are heavily impacted through multiple factors such as pollution, overexploitation, habitat loss/modification and climate change. India is also among the hotspots of water resource overuse that has caused a serious decline in freshwater availability. Given that healthy FWEs lie at the centre for supporting the country's ecology, health, economy, livelihoods and ultimately achieving multiple policy goals, it is crucial that holistic and focused efforts are made to protect, conserve, and restore all types of FWEs. We call for an urgent and a greater focus on implementing conservation actions for FWEs in India and suggest the following strategy to enhance focus on their conservation: (1) establishing a shared freshwater conservation vision at a national scale, (2) developing and including national freshwater conservation goals within global efforts, (3) conducting simultaneous conservation action planning at regional scales and (4) bridge planning to implementation gap by strengthening key enabling conditions: i) mainstream FWE conservation within key existing governance instruments, ii) secure sustainable conservation funding, iii) improve data access and knowledge translation; iv) create national awareness around importance of FWEs; v) facilitate collaboration among key actors.

Travel Restrictions in Siargao: An Intervention for the Island’s Long-Term Sustainability

An overwhelming influx of tourists to a destination can create massive pressure. Siargao, a tourism-first island known as "Asia's Best Island" and the "Surfing Capital of the Philippines", is one of the favorite spots and has captivated the hearts of tourists around the world. This study investigated the efficacy of travel restrictions to ensure the island’s long-term sustainability. This descriptive research, using a quantitative approach, utilized snowball sampling. Data were gathered from 400 respondents from the National Capital Region. The findings revealed that Siargao is popularly known as one of the top attractions in the Philippines, and respondents are aware that excessive tourism may lead to site deterioration. Restrictions could be an effective intervention to achieve island conservation. Stakeholders can make a substantial contribution to conservation efforts by closely observing tourist demand and behavior to incorporate the current travel restrictions into strategies and, thereby, prevent traffic and destruction of natural sites when visitation levels return to normal. These restrictions could be an effective environmental conservation intervention; therefore, implementing these travel limitations is an effective way to ensure long-term gains that contribute to Siargao’s conservation goals. Considering this additional intervention, a thorough intervention, and its impact will greatly help determine the significance of the improvement. Thus, this pioneering study provides supporting statements to help Siargao rise to the top Philippine destination and ensure the long-term sustainability of tourism.

Individual and community empowerment improve resource users' perceptions of community-based conservation effectiveness in Kenya and Tanzania.

Community-based conservation has been increasingly recognized as critical to achieve both conservation and socio-economic development goals worldwide. However, the long-term sustainability of community-based conservation programs is dependent on a broadly shared perception among community members that management actions are achieving their stated goals. Thus, understanding the underlying factors driving differences in perceptions of management effectiveness can help managers prioritize the processes and outcomes most valued by resource users and thereby promote sustained support for conservation efforts. Here, we utilize large-scale interview survey data and machine learning to identify the factors most strongly associated with differences in perceived management effectiveness between resource users engaged in marine community-based conservation programs in Kenya and Tanzania. Perceptions of management effectiveness were generally favorable in both countries, and the most important predictors of positive perceptions were associated with community and individual empowerment in resource management and use, but within disparate focal domains. Improved perceptions of management effectiveness in Kenya were closely related to increases in women's empowerment in community-based conservation programs, while inclusionary and transparent governance structures were the most important factors driving improved perceptions in Tanzania. Additionally, the strongest predictors of differences between individuals in both countries often interacted synergistically to produce even higher rates of perceived effectiveness. These findings can help future initiatives in the region tailor management to match community-level priorities and emphasize the need for community-based conservation programs to understand local context to ensure that metrics of "success" are aligned with the needs and desires of local resource users.

Challenges creating monarch butterfly management strategies for electric power companies in the United States

Returning monarch butterflies (Danaus plexippus) to sustainable levels of abundance will require an array of contributors to protect and restore habitat over broad areas. Due to the diversity and scale of land managed by electric power companies across the monarch range, plus an additional 32 million hectares needed for new solar arrays by 2050 to meet renewable energy goals, the industry may have potential to contribute to monarch conservation. However, it is challenging to clearly understand an individual company’s potential for monarch conservation because of the scale and distribution of their specific land assets (ranging from 4,800 to 240,000 hectares in this study alone), the complexity of monarch science, and the lack of a science-based approach for evaluating large land assets for monarch habitat. With monarchs potentially being protected under the United States Endangered Species Act in the future and thereby limiting land management approaches, there is interest from electric power companies to understand how their lands relate to monarchs. In collaboration with companies, we developed a GIS-based model to identify company landholdings that contain high-quality monarch habitat and applied the model to specific landholdings of eight power companies in the United States. We then facilitated discussions with company teams to balance conservation goals, corporate risk, and social opinion. This paper describes non-confidential results for developing a national GIS-based monarch habitat model and applying it to electric power companies who are considering monarch conservation while simultaneously transitioning to a new clean energy future. The model and applied experience may be useful for other organizations working across large landscapes to manage monarchs.

Need for structured conservation inputs: a geospatial approach for habitat prioritization to restrict disturbance regime in the protected areas of the Western Himalayan region

AbstractThe population boom increases land-use requirements, and shrinking regions are available to preserve natural biodiversity. Unfortunately, scientific knowledge does not seem to have and might never get a correct solution to how much territory will be sufficient for satisfying the various biodiversity conservation goals. Prioritization of habitat, primarily for threatened species, is a critical management challenge. Habitat management efforts are gradually being performed over broader geographic regions, emphasizing the necessity of spatial and strategic prioritization. Habitat prioritization is a technique popular for identifying critical areas needing conservation initiatives. To develop a strategic conservation framework, key issues must be identified based on the ground knowledge and present land use status, which are difficult to gather for highly rough terrain areas. Incorporating spatial data sets thus helps to get the desired knowledge of the site on a large scale. This study used a grid-based multicriteria approach to create a spatial conservation management framework for the Rajaji-Corbett landscape (RCL) in Northern India. A grid-based prioritization assessment was conducted to identify priority areas for the RCL, keeping invasive species and fire as significant threats. The indicators or criteria were selected by looking at present vital concerns in the landscape. We took 20 indicators for our multicriteria assessment for landscape prioritization of RCL using 2 × 2 km grids for the evaluation and classified them according to low, medium, and high priority areas using Arc GIS Pro. The results identified 931 sq. km area of this landscape needs immediate management interventions where frequent fire incidents and presence of invasive species are high. RCL is well known for its biodiversity wealth and assemblage of various wildlife populations.

Mitigation and conservation plant translocations: Do perspectives of practice, funding and success vary between sectors?

Conservation and mitigation translocations aim for similar positive outcomes for species under threat, however different motivations drive their implementation. Despite the clear human component behind motivation, there has been limited examination of practitioner perceptions and how they compare across the conservation and mitigation sectors, or how practitioners view budget, timelines, and outcomes. Using semi-structured interviews, we observed significantly greater investment of in-kind contributions, as well as longer planning and project duration phases in the conservation sector. The reliance of the conservation sector on in-kind contributions is fraught, because although it correlates with longer-term project investment, there are risks from fatigue of personnel. Despite general support for translocation, most practitioners perceived the goals of conservation and mitigation projects as different, and mitigation practitioners were less likely to feel that the resource expenditure was justified. Both practitioner types aligned perceptions of success, estimated via plant survival and recruitment, with IUCN Translocation Perspectives ranking criteria. Our results demonstrated that a large knowledge gap exists in understanding the motivational drivers of practitioners, which needs to be filled for improved translocation outcomes. Interviewees from both sectors identified people-related project elements, such as expectations and communication, as key areas requiring improvement for better project outcomes. Site, timelines, and maintenance were also nominated areas for improvement, but this perception was influenced by experience level. Given the rapid growth in this field, we suggest the most advantageous improvements could be made in mentoring, communication, and planning, ensuring staged success criteria aligned with both species and team goals.

Critical Watershed Prioritization through Multi-Criteria Decision-Making Techniques and Geographical Information System Integration for Watershed Management

The Precambrian hard rock topography of the Manbhum-Singhbhum plateau, which is well known for its semi-arid climates prone to drought, is often seen in Purulia district in West Bengal, India. Despite the district’s middling groundwater capacity, 17 out of 20 blocks have exorbitant fluoride pollution in the groundwater that negatively impacts the health of local residents. Approximately 13% of the whole area suffers from severe erosion. It is evident that the river Kangsabati and its tributaries are not well fed by rainwater and thereby there is always a dearth of ground water. The aim of this study was to identify and prioritize integral watersheds in the Purulia area using Multi-Criteria Decision Making (MCDM) and Geographic Information Systems (GIS). The evaluation was carried out in the Bandu sub-watershed, which contains five micro watersheds: 2A2B5m, 2A2B5k, 2A2B5h, 2A2B5b, and 2A2B5j. The analysis considered five major factors: lithological properties, land use and land cover, soil erosion, groundwater recharge, and hydrogeomorphology. The weights of these criteria were determined by the Analytical Hierarchy Process (AHP) model, which was then prioritized using the Techniques for Order of Preference by Similarity to the Ideal Solution (TOPSIS) technique. This study emphasized an integrated approach to assess watershed hazards and to establish rational conservation goals. The Central Ground Water Board (CGWB) of India report was referred during data analysis. As a result of this study, the 2A2B5k watershed emerged as the most critical due to its susceptibility across the analyzed parameters. This thorough plan demonstrated the usefulness of identifying watershed threads and prioritizing conservation efforts.

Communicating Expectations: Informing Strategic Communications by Conservation Level Segmentation and Impression Management Preferences

In the United States, collaboration between landowners and endangered species conservation (ESC) organizations is required to accomplish conservation goals. However, collective action for ESC is stymied by governance legitimacy deficits. Strategic communication is a tool used to accomplish organizational goals that can restore legitimacy through communications that re-align governance institutions with societal notions of appropriateness. Strategic communication, though, has yet to be investigated in the context of landowners and ESC. To illustrate how strategic communication can increase ESC collaboration, we surveyed 956 owners in Houston toad range in Texas to elicit their preferences for stewardship and communication constructs. Findings revealed distinct segments of landowners based on their stewardship preferences that preferred different types of communications. If ESC agencies are to enhance legitimacy amongst an increasingly heterogeneous landowner audience, they will want to adopt landowner-centric governance and communication strategies that account for differences in landowner conservation values, ESC experiences, and organizational expectations.

Applying the Taguchi Method to Improve Key Parameters of Extrusion Vacuum-Forming Quality.

This research investigates the control of thickness and weight in plastic extrusion vacuum-thermoforming products to identify optimal key parameters for cost reduction and energy savings. The initial step involves identifying crucial influencing factors. In this step, the Delphi technique was employed through a questionnaire administered to a panel of expert scholars to ensure minimal error and maximal reliability in determining key influencing factors. Consensus was sought to establish appropriateness and consistency. Subsequently, the Taguchi method was applied for quality design and planning of the extrusion vacuum-forming process. The experimental design parameters were selected using an L18 (21 × 37) orthogonal array, and the desired quality characteristics were determined. Comparative analysis of quantitative production data from two consecutive experiments was conducted, and based on F-values and contribution analysis, the combination of control factors maximizing the Signal-to-Noise (S/N) ratio was identified. The objective is to seek optimal parameters for improving the quality of the plastic polypropylene (PP cup lid) manufacturing process, reducing process variability, and identifying the most robust production conditions. Through multiple actual production prediction experiments, it was determined that five control factors, "polypropylene new material ratio," "T-die lips adjustment thickness", "mirror wheel temperature stability", "molding vacuum pressure time", and "forming mold area design", contribute to the maximization of the S/N ratio, i.e., minimizing variability. Statistical validation confirms a significant improvement in product quality and weight control. Noteworthily, the quality control model and experimental design parameters established in this study are also applicable to other plastic products and bio-based materials, such as PET, HIPS, and biodegradable PLA lids with added calcium carbonate. The results of the experimental production demonstrate its ability to consistently control product weight within the range of 3.4 ± 0.1 g, approaching the specified tolerance limits. This capability results in approximately 2.6% cost savings in product weight, contributing significantly to achieving a company's KPI goals for environmental conservation, energy efficiency, and operational cost reduction. Therefore, the findings of this study represent a substantial and tangible contribution.

Impacts of fire and prospects for recovery in a tropical peat forest ecosystem

Uncontrolled fires place considerable burdens on forest ecosystems, compromising our ability to meet conservation and restoration goals. A poor understanding of the impacts of fire on ecosystems and their biodiversity exacerbates this challenge, particularly in tropical regions where few studies have applied consistent analytical techniques to examine a broad range of ecological impacts over multiyear time frames. We compiled 16 y of data on ecosystem properties (17 variables) and biodiversity (21 variables) from a tropical peatland in Indonesia to assess fire impacts and infer the potential for recovery. Burned forest experienced altered structural and microclimatic conditions, resulting in a proliferation of nonforest vegetation and erosion of forest ecosystem properties and biodiversity. Compared to unburned forest, habitat structure, tree density, and canopy cover deteriorated by 58 to 98%, while declines in species diversity and abundance were most pronounced for trees, damselflies, and butterflies, particularly for forest specialist species. Tracking ecosystem property and biodiversity datasets over time revealed most to be sensitive to recurrent high-intensity fires within the wider landscape. These megafires immediately compromised water quality and tree reproductive phenology, crashing commercially valuable fish populations within 3 mo and driving a gradual decline in threatened vertebrates over 9 mo. Burned forest remained structurally compromised long after a burn event, but vegetation showed some signs of recovery over a 12-y period. Our findings demonstrate that, if left uncontrolled, fire may be a pervasive threat to the ecological functioning of tropical forests, underscoring the importance of fire prevention and long-term restoration efforts, as exemplified in Indonesia.

Habitat and respiratory strategy effects on hypoxia performance in anuran tadpoles.

A critical component of animal conservation in a changing world is an understanding of the physiological resilience of animals to different conditions. In many aquatic animals, hypoxia (low environmental oxygen levels) is a regular occurrence, but the likelihood and severity of hypoxia varies across habitats. Fast-flowing, stream-like habitats are never hypoxic, so long as flow is maintained. Do animals from such habitats retain the capacity to survive hypoxic conditions? We use aquatic frog tadpoles to test the effects of natural habitat on performance in hypoxia in an experimental framework, finding that stream-living tadpoles have reduced performance in hypoxia. Tadpoles also vary in lung presence, with some species able to breathe air during hypoxia. We found that among lunged tadpoles, air-breathing rates increase in hypoxia in pond-living species but not stream-living species. Lung presence was also found to influence hypoxia performance, as lungless, stream-living tadpoles were found to be especially vulnerable to hypoxia, while pond-living, lungless tadpoles appeared largely resilient to hypoxia. We consider the ramifications of our findings on conservation outlooks and strategies for frogs and their tadpoles, suggesting that stream-living tadpoles, and especially lungless, stream-living tadpoles, may be particularly at risk to factors that reduce stream flow. Thus, a primary goal for conservation and management of species with stream-living tadpoles should be the maintenance of year-round streamflow, which oxygenates waters and prevents hypoxia.