Ecological Indicators, Год журнала: 2023, Номер 155, С. 111019 - 111019
Опубликована: Окт. 7, 2023
Язык: Английский
Nature Communications, Год журнала: 2023, Номер 14(1)
Опубликована: Июнь 14, 2023
Abstract Temperature and biodiversity changes occur in concert, but their joint effects on ecological stability of natural food webs are unknown. Here, we assess these relationships 19 planktonic webs. We estimate as structural (using the volume contraction rate) temporal variation species abundances). Warmer temperatures were associated with lower stability, while had no consistent either property. While richness was higher Simpson diversity stability. The responses linked to disproportionate contributions from two trophic groups (predators consumers), both synchrony all within web distinctive three (predators, consumers, producers). Our results suggest that, ecosystems, warmer can erode ecosystem may not have effects.
Язык: Английский
Процитировано
26
Frontiers in Environmental Science, Год журнала: 2025, Номер 12
Опубликована: Янв. 9, 2025
The Yangtze River has experienced severe ecological degradation due to intensive human activities, including dam construction, land reclamation, and overfishing. These disturbances have disrupted the natural habitats of River, leading a sharp decline in fish biodiversity fishery resources. To address this crisis, Chinese government implemented 10-year fishing ban January 2021 mitigate pressures on populations, restore aquatic habitats, promote recovery. middle reaches are characterized by diverse species critical habitat for life, study seeks assess effects diversity, body structure, population community dynamics region. Fish monitoring data collected from 2017–2019 (pre-ban) 2021–2023 (post-ban) were analyzed evaluate changes size, structure. analysis results using PSD method indicate that size increased following ban, suggesting improvement structures, change complexity food web Species diversity indices showed partial recovery, but recovery was uneven across different sampling sites. While populations signs improvement, particularly terms stability, remained at relatively low levels some areas, indicating full resource may require extended conservation efforts. findings suggest while had positive initial impact conditions, continued long-term measures essential fully recovering river’s restoring its also highlights importance as part ongoing efforts effectiveness refine management strategies River.
Язык: Английский
Процитировано
2
Journal of Biogeography, Год журнала: 2023, Номер unknown
Опубликована: Окт. 3, 2023
Abstract Biotic interactions are widely recognised as the backbone of ecological communities, but how best to study them is a subject intense debate, especially at macro‐ecological scales. While some researchers claim that biotic need be observed directly, others use proxies and statistical approaches infer them. Despite this ambiguity, studying predicting influence on biogeographic patterns thriving area research with crucial implications for conservation. Three distinct currently being explored. The first approach involves empirical observation measurement interactions' effects species demography in laboratory or field settings. these findings contribute theory understanding species' demographies, they can challenging generalise larger scale. second centers inferring associations from co‐occurrences space time. goal distinguish environmental distributions. third constructs extensive potential interaction networks, known metanetworks, by leveraging existing knowledge about ecology interactions. This analyses local realisations networks using occurrence data allows large distributions multi‐taxa assemblages. In piece, we appraise three approaches, highlighting their respective strengths limitations. Instead seeing conflicting, advocate integration enhance our expand applications emerging biogeography. shows promise ecosystem management Anthropocene era.
Язык: Английский
Процитировано
18
The American Naturalist, Год журнала: 2025, Номер unknown
Опубликована: Март 27, 2025
Язык: Английский
Процитировано
1
Proceedings of the Royal Society B Biological Sciences, Год журнала: 2025, Номер 292(2046)
Опубликована: Май 1, 2025
Understanding how environmental and human pressures impact the temporal stability of fish community biomass on shallow reefs is essential for effective conservation management. These influence directly, by affecting species’ asynchrony in fluctuations. However, their effects may also indirectly depend functional traits species composing community, which remains poorly understood. Here, we examine both direct indirect, trait-mediated variability impacts 215 Australian reefs. communities span a 10-degree sea surface temperature (SST) gradient have been monitored over 14 years. Our results indicate higher tropical owing to trait diversity redundancy colder, temperate mean trophic level. Human impacts, through negative diversity, were main destabilizing factor biomass. Temporal change SST destabilized while increasing level communities. Overall, our findings show that comprehensive analysis multiple facets crucial better understand forecast long-term marine ecosystems under global change.
Язык: Английский
Процитировано
1
Scientific Reports, Год журнала: 2022, Номер 12(1)
Опубликована: Июнь 27, 2022
Demersal fisheries are one of the top anthropic stressors in marine environments. In long term, some species more vulnerable to fishery impacts than others, which can lead permanent changes on food web. The trophic relationships between predator and prey constitute web it represents a network energy channels an ecosystem. turn, structure influences ecosystem diversity stability. first aim this study was describe for time San Jorge Gulf (Patagonia Argentina) with high resolution, i.e. level when information is available. subject intense thus our second analyse without evaluate if bottom-trawl industrial altered We used several metrics like: mean level, omnivory, modularity quasi-sign included these because they related stability be evaluated using diets that weight links predators prey. presented 165 organized almost five levels. inclusion node adds 69 new links. All weighted unweighted showed differences two networks, reflecting decrease system. Thus, results suggested probable change state observed abundances since established, could represent predicted by analysis. Our suggests webs human activity ecosystems.
Язык: Английский
Процитировано
20
BioScience, Год журнала: 2023, Номер 73(12), С. 862 - 878
Опубликована: Ноя. 1, 2023
Abstract Food webs represent trophic interactions within ecosystems. Matching traits of consumers and resources helps infer food-web properties. Environmental (e)DNA, commonly used for detecting species occurrences, is rarely in trait-matching studies because abundance estimates descriptions relevant are generally missing. We synthesized recent literature on inferences with eDNA trait matching to identify challenges opportunities coupled eDNA–trait recording schemes. Our case study shows how coupling data collection improves the ability characterize greater numbers food across multiple scales ranging from spatiotemporal variation. Future-proofing sets requires new or compilation existing at that detect current future changes
Язык: Английский
Процитировано
12
Frontiers in Plant Science, Год журнала: 2022, Номер 13
Опубликована: Ноя. 30, 2022
The relationship between diversity and stability is a focus in community ecology, but the relevant hypotheses have not been rigorously tested at trophic network levels due to lack of long-term data species interactions. Here, by using seed tagging infrared camera tracking methods, we qualified seed-rodent interactions, analyzed associations rodent with diversity, abundance, complexity 15 patches subtropical forest from 2013 2021. A total 47,400 seeds were released, 1,467 rodents marked, 110 networks reconstructed estimate richness, metrics. We found, younger older stands, richness abundance (biomass) increased, while those decreased, leading higher nestedness, linkage density, generality connectance stands. With increase temperature precipitation, (biomass), growth rate increased significantly. found (i.e., inverse variability) was significantly positively associated availability, density networks, providing evidence supporting Bottom-Up Diversity-Stability Hypotheses Abundant Food Hypothesis. Our findings highlight significant role resource availability promoting consumers’ levels, necessity protecting biodiversity for increasing ecosystem under human disturbance climate variation.
Язык: Английский
Процитировано
15
Ecology, Год журнала: 2023, Номер 105(2)
Опубликована: Дек. 1, 2023
A tenet of ecology is that temporal variability in ecological structure and processes tends to decrease with increasing spatial scales (from locales regions) levels biological organization populations communities). However, patterns across trophic the mechanisms produce them remain poorly understood. Here we analyzed abundance time series spatially structured communities (i.e., metacommunities) spanning basal resources top predators from 355 freshwater sites three continents. Specifically, used a hierarchical partitioning method disentangle propagation levels. We then structural equation modeling determine if strength direction relationships between variability, synchrony, biodiversity, environmental settings depended on level scale. found decreased producers tertiary consumers but did so mainly at local Species population synchrony within increased level, whereas among decreased. At scale, precipitation species diversity were associated (linear partial coefficient, β = 0.23) (β -0.39) similarly levels, respectively. regional community was not related climatic or predictors, metacommunity systematically 0.73) secondary 0.54), primary 0.30) 0). Our results suggest mobile may often stabilize metacommunities by buffering originates base food webs. This finding illustrates metacommunities, which integrates variation organismal body size its correlates, should be considered when investigating stability natural systems. More broadly, our work advances notion an emergent property ecosystems threatened complex ways biodiversity loss habitat fragmentation.
Язык: Английский
Процитировано
9
Ecology Letters, Год журнала: 2024, Номер 27(8)
Опубликована: Авг. 1, 2024
Abstract Nutrient enrichment and climate warming threaten freshwater systems. Metabolic theory the paradox of predict that both stressors independently can lead to simpler food‐webs having fewer nodes, shorter food‐chains lower connectance, but cancel each other's effects when simultaneously present. Yet, these theoretical predictions remain untested in complex natural We inferred food‐web structure 256 lakes 373 streams from standardized fish community samplings France. Contrary predictions, we found shortens food‐chain length this effect was magnified enriched lakes. Additionally, experiencing exhibit connectance their food‐webs. Our study suggests interact magnify simplification nature, raising further concerns about fate systems as change will dramatically increase coming decades.
Язык: Английский
Процитировано
3