Ecological Theory Research Articles

The organizational ecology of the global space industry

The global space industry is booming. While governmental agencies used to dominate outer space activities, private space organizations (PSOs) now launch rockets, operate strategic satellites, and even take tourists on space expeditions. How can we explain this emergence of PSOs? Building on organizational ecology theory and drawing on a novel dataset of 1751 space organizations and 52 semi-structured interviews, this paper finds that mutualistic relations between governmental space agencies and PSOs have been instrumental in the rise of PSOs. This emphasis on mutualism challenges the prevailing belief that a few visionary private entrepreneurs create the space industry from the ground up. It also refutes the notion that PSOs simply out-compete a stagnant public sector. PSOs have not superseded governmental space agencies; they are nurtured by and developed with them. This paper is one of the first to explain how private actors can emerge in a field historically dominated by governmental actors. In so doing, it contributes to studies on public-private interactions by showing how mutualism can structure a nascent industry. It also opens up new avenues for research on the political economy of outer space by making available a rich dataset of space actors.

Trees have overlapping potential niches that extend beyond their realized niches.

Tree species appear to prefer distinct climatic conditions, but the true nature of these preferences is obscured by species interactions and dispersal, which limit species' ranges. We quantified realized and potential thermal niches of 188 North American tree species to conduct a continental-scale test of the architecture of niches. We found strong and consistent evidence that species occurring at thermal extremes occupy less than three-quarters of their potential niches, and species' potential niches overlap at a mean annual temperature of ~12°C. These results clarify the breadth of thermal tolerances of temperate tree species and support the centrifugal organization of thermal niches. Accounting for the nonrealized components of ecological niches will advance theory and prediction in global change ecology.

Relationship between Urbanization and Parasite Infections in Wildlife in South Africa

Purpose: To aim of the study was to analyze the relationship between urbanization and parasite infections in wildlife in South Africa. Methodology: This study adopted a desk methodology. A desk study research design is commonly known as secondary data collection. This is basically collecting data from existing resources preferably because of its low cost advantage as compared to a field research. Our current study looked into already published studies and reports as the data was easily accessed through online journals and libraries. Findings: Urbanization in South African wildlife alters ecosystems, disrupting behavior and increasing parasite prevalence. Urban areas introduce new environments affecting parasite transmission dynamics, especially vector-borne diseases. Wildlife responses vary; some adapt, reducing parasite exposure, while others face higher loads due to stress and habitat changes. Human-wildlife interactions in urban settings heighten the risk of zoonotic parasite transmission. Conservation efforts should prioritize long-term monitoring and interdisciplinary research to mitigate these impacts on wildlife health. Unique Contribution to Theory, Practice and Policy: Island biogeography theory, ecological niche theory & one health concept may be used to anchor future studies on relationship between urbanization and parasite infections in wildlife in South Africa. Regular health checks and parasite screenings for urban wildlife should be established to monitor and manage parasite infections. Policies should be established to address the impacts of urbanization on wildlife health, including regulations on green space development, waste management, and the control of domestic animal interactions with wildlife.

A fRAmework of the DetermInants of Arts aNd Cultural Engagement (RADIANCE): integrated insights from ecological, behavioural and complex adaptive systems theories.

Arts and cultural engagement (ACEng) is ubiquitous across every human culture since palaeolithic times, but in contemporary society, ACEng is unevenly distributed, demographically, socio-economically, geographically and politically. But what are the "determinants" of ACEng (i.e., the facilitators or barriers to people's engagement) and how can they be optimised? Despite a large body of theory and evidence on individual determinants, this work has largely occurred in disciplinary silos, which has led variously to contrasting discourses and approaches, criticism, and inconsistent findings. What we lack is a rigorous comprehensive understanding of these determinants (both those already theorised and those that have been little recognised as determinants to date) that goes beyond descriptively showing inequalities, instead explaining why these inequalities exist and how they can be overcome. This paper explores the currently recognised determinants of ACEng, and existing theoretical approaches to these determinants. Drawing on the theoretical bases of ecological systems theory, ecosocial theory and complex adaptive systems science, we conducted a review and iterative theorising process. We propose a new theoretical framework of the determinants of arts and cultural engagement (RADIANCE) developed through cross-disciplinary literature reviewing, domain mapping, and consensus building. Overall, we identified 35 different factors that can act as determinants of ACEng across micro, meso, exo, macro and chrono levels. We broadly categorised these as social (i.e. a primary feature being the interaction of people), tangible (i.e. a primary feature involving physical assets or resources or the production of physical assets), and intangible (i.e. constructs that do not have a primary physical basis but instead have a virtual or imaginary basis). The relevance and implications of this framework for broader research, policy, and practice and case studies of it in use are presented.

Analysis of Wildlife Migration Patterns and Habitat Connectivity in Malaysia

Purpose: The aim of the study was to investigate the analysis of wildlife migration patterns and habitat connectivity in Malaysia. Methodology: This study adopted a desk methodology. A desk study research design is commonly known as secondary data collection. This is basically collecting data from existing resources preferably because of its low cost advantage as compared to a field research. Our current study looked into already published studies and reports as the data was easily accessed through online journals and libraries. Findings: Recent studies on wildlife migration patterns in Malaysia highlight critical corridors for genetic diversity and species resilience, emphasizing the urgent need for conservation efforts to combat habitat fragmentation. Spatial analysis techniques have been crucial in mapping optimal routes and prioritizing conservation areas, offering valuable guidance for policymakers and conservationists aiming to sustain Malaysia's biodiversity. Unique Contribution to Theory, Practice and Policy: Met population theory, landscape ecology theory & movement ecology theory may be used to anchor future studies on the analysis of wildlife migration patterns and habitat connectivity in Malaysia. Insights from wildlife migration studies inform practical conservation strategies. Policies informed by migration research can address climate change impacts on wildlife by preserving migration corridors that allow species to adapt to changing environmental conditions.

Study of Carbon Sequestration in Forest Ecosystems in DRC

Purpose: The aim of the study was to investigate the study of carbon sequestration in forest ecosystems in DRC. Methodology: This study adopted a desk methodology. A desk study research design is commonly known as secondary data collection. This is basically collecting data from existing resources preferably because of its low cost advantage as compared to a field research. Our current study looked into already published studies and reports as the data was easily accessed through online journals and libraries. Findings: Research on carbon sequestration in DRC's forests underscores their crucial role as significant carbon sinks. These forests store substantial amounts of carbon in biomass and soils, contributing significantly to global climate regulation efforts. However, challenges like deforestation and illegal logging threaten this capacity, highlighting the importance of sustainable forest management and conservation. Enhancing carbon sequestration in DRC's forests is essential for mitigating climate change impacts and preserving biodiversity. Unique Contribution to Theory, Practice and Policy: Ecological succession theory, resource allocation theory & social-ecological systems theory may be used to anchor future studies on the study of carbon sequestration in forest ecosystems in DRC. Encourage the adoption of sustainable forestry practices that enhance carbon sequestration while supporting biodiversity conservation and local livelihoods. Align forest management policies with national and international climate change mitigation goals, emphasizing the role of forests as natural carbon sinks.

Unpacking in-service EFL teachers’ professional learning in a study abroad teacher education programme: an ecological perspective

ABSTRACT Despite the prevalence of study abroad teacher education programmes, there remains a dearth of research on teachers’ learning in such contexts compared to the extensive body of research on students’ study abroad experiences. However, the importance of teachers’ learning is widely recognized as contributing to students’ learning outcomes. Considering this, the present research investigated the learning experiences of a group of Chinese in-service English as a Foreign Language (EFL) teachers in study abroad teacher education programmes in the UK. Informed by ecological systems theory, the findings revealed that in-service EFL teachers perceived various benefits from the programme, including in the areas of culture and language, pedagogy, and research. Furthermore, the analysis underscored the interconnectedness of the ecological factors at four levels that influence teachers’ learning in study abroad settings. These findings contribute to the expanding literature on study abroad experiences by incorporating the perspectives of in-service EFL teachers. Additionally, this study offers insights for stakeholders involved in international teacher education programmes, including programmes coordinators, policymakers, participating teachers, teacher educators, and researchers.

Population and community ecology: past progress and future directions.

Population and community ecology as a science are about 100 years old, and we discuss here our opinion of what approaches have progressed well and which point to possible future directions. The three major threads within population and community ecology are theoretical ecology, statistical tests and models, and experimental ecology. We suggest that our major objective is to understand what factors determine the distribution and abundance of organisms within populations and communities, and we evaluate these threads against this major objective. Theoretical ecology is elegant and compelling and has laid the groundwork for achieving our overall objectives with useful simple models. Statistics and statistical models have contributed informative methods to analyze quantitatively our understanding of distribution and abundance for future research. Population ecology is difficult to carry out in the field, even though we may have all the statistical methods and models needed to achieve results. Community ecology is growing rapidly with much description but less understanding of why changes occur. Biodiversity science cuts across all these subdivisions but rarely digs into the necessary population and community science that might solve conservation problems. Climate change affects all aspects of ecology but to assume that everything in population and community ecology is driven by climate change is oversimplified. We make recommendations on how to advance the field with advice for present and future generations of population and community ecologists.

The interplay of facilitation and competition drives the emergence of multistability in dryland plant communities.

Within communities, species are wrapped in a set of feedbacks with each other and with their environment. When such feedbacks are strong enough they can generate alternative stable states. So far, research on alternative stable states has mostly focused on systems with a small number of species and a limited diversity of interaction types. Here, we analyze a spatial model of plant community dynamics in stressed ecosystems such as drylands, where each species is characterized by a strategy, and the different species interact through facilitation and competition for space and resources, such as water. We identify three different types of multistability emerging from the interplay of competition and facilitation. Under low-stress levels, plant communities organize in small groups of coexisting species, maintained by space, competition and facilitation ("cliques"). Under higher stress levels, positive feedback from facilitation lead to the dominance of a single facilitating species ("mutual exclusion states"). At the highest stress levels, the single facilitating species left in the system coexists with the desert state. By linking community ecology and alternative stable states theory using a spatial plant community model for stressed ecosystems, our study contributes to highlight the importance of positive feedback loops for the stability of ecological communities.

Impacts of polycultural cropping on crop yields and biodiversity: A systematic map protocol

Abstract Agriculture is currently the largest driver of biodiversity‐loss worldwide. There is a critical need to develop agricultural systems that protect and promote biodiversity, while also meeting local and global food needs. Ecological theory suggests that cultivating crops in diverse mixtures both maximises niche occupancy and generates additional niches, generating both higher yields and higher biodiversity than cultivation in monocultures. A large and growing body of agronomic research provides strong evidence for the potential productivity and biodiversity benefits of in‐field crop‐diversification strategies. This protocol sets out a methodology for a systematic map of evidence on yield‐ and biodiversity‐outcomes in ‘polycultures’—systems of cultivation where multiple food crop species are grown together simultaneously at field‐scale. Systematic searches with a global scope will be conducted in Web of Science Core Collection, Scopus, and CAB Abstracts to yield a comprehensive sample of relevant published, peer‐reviewed literature. The articles returned by searches will be subject to eligibility screening according to pre‐defined inclusion criteria, at successive stages (title and abstract, and full text). Following this, we will extract data from eligible studies on study designs, survey and sampling protocols, experimental treatments and comparators, and outcomes measured. A narrative synthesis, illustrated by tables, figures and maps, will describe the quantity and characteristics of the available evidence on the impacts of polycultural cropping on (i) crop yields, and (ii) agroecosystem biodiversity. We will also identify the research that examines these two outcomes in parallel. The synthesis will be accompanied by a published database containing bibliographic information as well as data (see ‘2’) on study characteristics and outcomes. Practical implications. The anticipated systematic map will provide a synthesis of current evidence regarding the potential yield‐ and biodiversity‐impacts of polycultural cropping. We will identify key knowledge gaps, and ‘clusters’ of related evidence that could lend themselves to further quantitative synthesis via subsequent systematic reviews and/or meta‐analyses. As such, the work will facilitate future appraisal of the potential of polyculture as a tool to bridge the currently conflicting priorities of food production on the one hand and biodiversity conservation on the other.

Grazing effects on vegetation: Biodiversity, management, and restoration

AbstractIn many regions, wild large herbivores have maintained open landscapes up to and including historic times, but, more recently, have been largely replaced by domestic livestock. By employing extensive and traditional grazing and browsing regimes, conservation actions support biodiversity and recovery in natural and degraded areas. However, grazing also plays other important ecological roles, for example, in the maintenance and/or recovery of important ecosystem services, such as biomass production and carbon sequestration. Understanding herbivore effects on plant composition and functional diversity, and ecosystem functioning and services, is essential for informing ecological theory and practice. The current Special Issue highlights that the effects of grazing on vegetation are strongly context‐dependent. The articles identify at least three major factors acting in concert, which are responsible for contrasting diversity and functional patterns of vegetation subjected to herbivores: (i) herbivore identity; (ii) grazing intensity; and (iii) vegetation type. Insights from this Special Issue imply that long‐term experiments across different habitat types and in underrepresented regions are needed to provide valuable information for grazing planning and management. They also demonstrate that integrating indigenous and traditional ecological knowledge, and considering socio‐economic contexts, can provide opportunities for improving sustainable grazing management.

Maroon Anti-necropolitics

This article describes Maroon anti-necropolitics and its implications for multispecies justice to aid in creating a genuinely decolonial Caribbean ecological theory. Ndyuka Maroons, the descendants of one nation of self-liberated formerly enslaved Black Surinamese peoples, have created a cosmopolitical order based on the refusal of necropolitics (which is the assumption that politics must be predicated on the sovereign human appropriation of the right to kill or let die). In its place, Ndyukas practice an ethics of sociality premised on the shared collective vulnerability of present and future generations to the consequences of acts of killing. This Maroon anti-necropolitics has three primary principles: (1) death always relates specific deaths to future collective harm; (2) humans do not have a sovereign right to death over the lives of others; and (3) death does not rupture relations between the living and the dead, or the community and its enemies, but intensifies them by imposing ineradicable connections of tragic loss between perpetrators and victims. Ndyukas accordingly articulate a theory of relational justice that rejects human sovereignty while emphasizing human responsibility. This article illustrates how Maroons have imagined a world beyond necropolitics and why this helps confront the ways in which necropolitical assumptions inflect how multispecies justice is imagined.

Factors driving microbial biomass and necromass relationships display ecosystem‐dependent responses

AbstractMicroorganisms help govern soil organic carbon (SOC) turnover and accumulation. Whilst it is increasingly clear that microbial necromass is a precursor of SOC formation, the relationship between living microorganisms, necromass turnover and SOC persistence remains elusive. In this study, we used phospholipid fatty acids and amino sugars to quantify living versus dead microbial carbon concentrations and evaluated the utility of each pool as an indicator of SOC persistence across a range of climates (low‐, mid‐ and high‐latitude sites) and ecotypes (old‐growth forests vs. managed croplands). We found that microbial necromass was higher in forest than in cropland soils and was positively correlated with soil moisture, SOC and total nitrogen (TN). However, the flow of microbial biomass into necromass and SOC was decoupled in forest sites, likely because the high soil SOC/TN ratio accelerated necromass turnover and recycling by living microorganisms. In contrast, microbial biomass and necromass pools were tightly coupled in croplands and influenced by multiple environmental and biological factors (e.g., necromass concentrations exhibited greater variability in soils with more bacteria than fungi, and those with more gram‐positive than gram‐negative taxa). Contrasting our expectations, the proportion of microbially‐derived necromass in SOC was decoupled from soil properties and microbial biomass in both ecotypes. Whilst SOC and pH appear to be universal drivers of necromass cycling, feedbacks between living biomass, necromass and SOC are shaped by local factors. Our results contribute to ecological theory by highlighting the environmental and biological factors underpinning SOC formation and turnover that can be used to inform land‐management practices that optimize below‐ground carbon sequestration.

Generation Z's Binge-Watching Lifestyle in Using Over-The-Top (OTT) Media Services in Indonesia

Indonesia is the country with the highest Over-The-Top (OTT) media consumption in Southeast Asia. The consumption of OTT media grows by 40% every year. The existence of OTT media has raised the binge-watching phenomenon. This research focuses on how Generation Z's binge-watching lifestyle uses OTT media. This research uses a qualitative methodology by conducting a Focus Group Discussion (FGD) with four to six informants from six regions in Indonesia who actively use OTT media. The theory used in this research is the Media Ecology Theory. Results show that Generation Z watches movies they like more than three hours daily. They determine the duration, frequency, and platforms they want to use. Generation Z's motivations for binge-watching are pleasure (as a medium of entertainment and relaxation), efficiency (easy to access), control (having low self-control), fandom (wanting to feel close to the player), and recommendations from others (not being left behind by others). Binge-watching positively impacts by providing a more open perception of experience, thoughts, and points of view. However, binge-watching has negative impacts, such as lack of sleep and increased imagination. OTT media is advised to provide hourly reminders to viewers to pause while binge-watching. Keywords: Binge-watching, Over-The-Top (OTT) media, generation Z, lifestyle, COVID-19 pandemic.

Innovative Educational Broadcasting: UGTV's Influence on Gunadarma Students and the Wider Community

Television remains a medium for delivering information and entertainment, to communities, particularly in areas with unequal access to the internet, so television becomes their primary source. This study aimed to explore how UGTV is utilized to deliver educational content to students of Gunadarma University and the wider community. Using a qualitative method with a constructivist paradigm, this study was grounded in the Media Ecology Theory. Data were collected through observation, in-depth interviews, documentation, and literature studies. The findings revealed that UGTV, as an educational digital television platform, effectively provides academic and innovative content useful for the community, particularly students. The contents are produced and packaged to be informative and appealing to the community.

A transition from arbuscular to ectomycorrhizal forests halts soil carbon sequestration during subtropical forest rewilding

Ecological succession and restoration rapidly promote multiple dimensions of ecosystem functions and mitigate global climate change. However, the factors governing the limited capacity to sequester soil organic carbon (SOC) in old forests are poorly understood. Ecological theory predicts that plants and microorganisms jointly evolve into a more mutualistic relationship to accelerate detritus decomposition and nutrient regeneration in old than young forests, likely explaining the changes in C sinks across forest succession or rewilding. To test this hypothesis, we conducted a field experiment of root-mycorrhizal exclusion in successional subtropical forests to investigate plant-decomposer interactions and their effects on SOC sequestration. Our results showed that SOC accrual rate at the 0–10 cm soil layer was 1.26 mg g−1 yr−1 in early-successional arbuscular mycorrhizal (AM) forests, which was higher than that in the late-successional ectomycorrhizal (EcM) forests with non-significant change. A transition from early-successional AM to late-successional EcM forests increase fungal diversity, especially EcM fungi. In the late-successional forests, the presence of ectomycorrhizal hyphae promotes SOC decomposition and nutrient cycle by increasing soil nitrogen and phosphorus degrading enzyme activity as well as saprotrophic microbial richness. Across early- to late-successional forests, mycorrhizal priming effects on SOC decomposition explain a slow-down in the capacity of older forests to sequester soil C. Our findings suggest that a transition from AM to EcM forests supporting greater C decomposition can halt the capacity of forests to provide nature-based global climate change solutions.

Assembly, Persistence, and Disassembly Dynamics of Quaternary Caribbean Frugivore Communities.

AbstractHow communities assemble and restructure is of critical importance to ecological theory, evolutionary theory, and conservation, but long-term perspectives on the patterns and processes of community assembly are rarely integrated into traditional community ecology, and the utility of communities as an ecological concept has been repeatedly questioned in part because of a lack of temporal perspective. Through a synthesis of paleontological and neontological data, I reconstruct Caribbean frugivore communities over the Quaternary (2.58 million years ago to present). Numerous Caribbean frugivore lineages arise during periods coincident with the global origins of plant-frugivore mutualisms. The persistence of many of these lineages into the Quaternary is indicative of long-term community stability, but an analysis of Quaternary extinctions reveals a nonrandom loss of large-bodied mammalian and reptilian frugivores. Anthropogenic impacts, including human niche construction, underlie the recent reorganization of frugivore communities, setting the stage for continued declines and evolutionary responses in plants that have lost mutualistic partners. These impacts also support ongoing and future introductions of invader complexes: introduced plants and frugivores that further exacerbate native biodiversity loss by interacting more strongly with one another than with native plants or frugivores. This work illustrates the importance of paleontological data and perspectives in conceptualizing ecological communities, which are dynamic and important entities.

Can multi‐species plantings alleviate abiotic stressors to enhance Bald cypress restoration?

Restoration researchers and practitioners alike advocate for novel restoration approaches, informed by ecological theories and principles, to enhance the likelihood of meeting restoration goals. Forested wetland restoration has historically focused on creating abiotic conditions that support the tolerance thresholds of desired species, but the stress gradient hypothesis provides guidance for potential new strategies that use biotic interactions to ameliorate stressful abiotic conditions. In this study, we tested whether multi‐species planting approaches can be used to enhance the survival and growth of a target restoration tree species, Bald cypress, along multiple abiotic gradients. We conducted a fully factorial controlled greenhouse experiment which manipulated above‐ and belowground interactions between two species (Bald cypress and Soft rush), as well as light availability and depth of inundation. Our findings showed that co‐planting Bald cypress seedlings with Soft rush did not increase tree biomass production or growth metrics (e.g. stem height and leaf area) under any exposed stress combination. Importantly, we found that full‐sun irradiance negatively impacted functional traits associated with the tree seedlings' health and ability to photosynthesize. Our findings are important for consideration by practitioners as light is rarely the focus of wetland ecosystem restoration and degraded forested wetlands or restoration sites often have open canopies.

Reporting guidelines for terrestrial respirometry: Building openness, transparency of metabolic rate and evaporative water loss data

Respirometry is an important tool for understanding whole-animal energy and water balance in relation to the environment. Consequently, the growing number of studies using respirometry over the last decade warrants reliable reporting and data sharing for effective dissemination and research synthesis. We provide a checklist guideline on five key sections to facilitate the transparency, reproducibility, and replicability of respirometry studies: 1) materials, set up, plumbing, 2) subject conditions/maintenance, 3) measurement conditions, 4) data processing, and 5) data reporting and statistics, each with explanations and example studies. Transparency in reporting and data availability has benefits on multiple fronts. Authors can use this checklist to design and report on their study, and reviewers and editors can use the checklist to assess the reporting quality of the manuscripts they review. Improved standards for reporting will enhance the value of primary studies and will greatly facilitate the ability to carry out higher quality research syntheses to address ecological and evolutionary theories.

Socio-demographic And Household Sanitation Factors Affect the Quality of Life

Background: In any society, it is widely accepted that the productive age population's Quality of life (QoL) determines the nation's development. As Indonesia is a developing country, an assessment of the QoL of this group needs concern. Empirical studies have found various factors related to quality of life. However, ecological theory states that environmental factors, including household factors, influence individuals. This study investigates factors associated with the quality of life among productive ages in the general population, including individual factors and home sanitation. Methods: A population-based cross-sectional study was carried out in 23 provinces in Indonesia. The modified 38-item Indonesia Family Life Survey (IFLS) questionnaire measured quality of life. The total number of productive age people aged 15-64 was 14953 subjects, and 6806 households were used as the population. Determinant factors tested in this study are socio-demographics (age, gender, education, marital status, and primary activity in the past week) and home sanitation. Data analysis was conducted using multilevel logistic regression. Results: 50.96% (7.620) of productive age have a good quality of life. The study confirmed that age, gender, marital status, education, and primary activity were significant to the QoL. The main finding of this study was that home sanitation had a contextual effect on productive age’s quality of life (ICC = 32.4%, CI = 0.289 – 0.520). Conclusion: Investigation of essential factors related to QoL determines appropriate policy programs and interventions in an effort to improve quality of life. Evaluation of quality of life should concern home sanitation. Sanitation Affects broader aspects of physical and mental health.