Biodiversity patterns diverge along geographic temperature gradients

Global Change Biology, Journal Year: 2022, Volume and Issue: 29(3), P. 603 - 617

Published: Sept. 28, 2022

Models applying space-for-time substitution, including those projecting ecological responses to climate change, generally assume an elevational and latitudinal equivalence that is rarely tested. However, a mismatch may lead different capacities for providing climatic refuge dispersing species. We compiled community data on zooplankton, ectothermic animals form the consumer basis of most aquatic food webs, from over 1200 mountain lakes ponds across western North America assess biodiversity along geographic temperature gradients spanning nearly 3750 m elevation 30° latitude. Species richness, phylogenetic relationships, functional diversity all showed contrasting gradients, with richness metrics plateauing at low elevations but exhibiting intermediate maxima. The nonmonotonic/hump-shaped trends latitude emerged interactions, weaker relationships higher (i.e. in alpine lakes) linked underlying drivers. Here, divergent patterns trait dispersion indicate shifting roles environmental filters limiting similarity assembly communities increasing further tested whether common warmer temperatures found mean annual (but not seasonal) predicted failed capture consistent latitude, meaning predictions how change will influence also differ between gradients. Contrasting elevation- latitude-driven warming suggest limits refugia likely greater barriers northward range expansion.

Language: Английский

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Geographical and climate‐dependent patterns in spatial distributions of snail (Mollusca: Gastropoda) assemblages in freshwater wetlands across Northeast China

Freshwater Biology, Journal Year: 2023, Volume and Issue: 68(6), P. 1066 - 1078

Published: April 12, 2023

Abstract A central goal of community ecology and biogeography involves understanding the spatial patterns organisms their underlying mechanisms. Understanding how structure wetland biomes vary throughout geographical or climatic gradients has critical implications for ecological restoration management wetlands. However, snails in freshwater wetlands relative contributions local environment variables remain poorly elucidated. We investigated 126 across four ecoregions (Da Xing'an Mountains, Songnen Plain, Sanjiang Plain Changbai Mountains) Northeast China, collected 105578 individual (Mollusca: Gastropoda) belonging to 17 families, 34 genera 64 species. Overall, snail richness functional alpha diversity was higher than other three regions. Multivariate analyses results revealed that taxonomic, phylogenetic structures assemblages differed significantly Higher taxonomic dissimilarities, as well dissimilarities existed between The variations were predominantly explained by rather environmental variables. For structure, salinity greatest variation among all variables, whereas precipitation seasonality structure. Considering extant assemblage its predictors, aggravated salinization are expected act powerful factors shaping future assemblages. Also, climate‐related cause changes distribution invertebrate should be considered formulate differentiated strategy biodiversity conservation.

Language: Английский

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A global assessment of environmental and climate influences on wetland macroinvertebrate community structure and function

Global Change Biology, Journal Year: 2024, Volume and Issue: 30(2)

Published: Feb. 1, 2024

Abstract Estimating organisms' responses to environmental variables and taxon associations across broad spatial scales is vital for predicting their climate change. Macroinvertebrates play a major role in wetland processes, but studies simultaneously exploring both community structure trait gradients are still lacking. We compiled global dataset (six continents) from 756 depressional wetlands, including the occurrence of 96 macroinvertebrate families, phylogenetic tree, 19 biological traits. Using Bayesian hierarchical joint species distribution models (JSDMs), we estimated compared influences local climatic predictors on individual families While were mainly related broad‐scale factors (maximum temperature precipitation seasonality), traits strongly hydroperiod. Interestingly, showed positive negative same variables. As expected, many family occurrences positively associated with temperature, few opposite pattern found cooler or montane regions. also that communities would likely be affected by changing climates through alterations seasonality, area. Temperature increases may negatively affect collector shredder functional groups. A decrease could lead reductions area benefiting drought‐tolerant macroinvertebrates, it macroinvertebrates lacking those adaptations. Wetland processes compromised changes altering distributions hydroperiod shifts organism Our complementary family‐based trait‐based approaches elucidate complex effects change produce ecosystems.

Language: Английский

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Are the Seasonal Dynamics of Zooplankton Different Between Contrasting Climatic Zones in Brazil? A Comparison Between Tropical and Subtropical Rivers

River Research and Applications, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 9, 2025

ABSTRACT The unique environmental characteristics of the tropics and subtropics, including precipitation patterns, photoperiods temperatures, can influence riverine zooplankton communities in contrasting ways. Therefore, we aimed to investigate seasonal dynamics tropical subtropical rivers compare structure response distinct climatic conditions. To this end, collected samples from located two different zones Brazil (tropical subtropical) during winter, spring, summer autumn. Our results showed that testate amoebae rotifers play a crucial role both zones, emerging as predominant groups regarding density, species richness diversity. In rivers, variations are strongly influenced by temperature flooding events, which affect total suspended solids, turbidity pH. closely linked fluctuations dissolved oxygen. We identified 142 taxa, with zone comprising 125 taxa 97 taxa. also revealed had greater diversity than rivers. This disparity was primarily attributed higher nutrient concentrations lower thermal amplitudes waters compared those waters. Thus, it is evident conditions have varying influences on dynamics, highlighting need consider regional management conservation aquatic ecosystems.

Language: Английский

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Ephemeral Wetland Macroinvertebrate Communities Across Climate Regions Share Similar Functional Trait Composition Despite Near‐Total Taxa Replacement

Freshwater Biology, Journal Year: 2025, Volume and Issue: 70(4)

Published: April 1, 2025

ABSTRACT Community assembly in aquatic habitats is heavily influenced by hydrology, but understanding the influence of other habitat conditions also critical. Most studies focus on comparisons geographically close communities that exist under diverse hydrological regimes, this framework limits our ability to understand how than hydrology shape ephemeral wetland communities. Here, we investigated macroinvertebrate vary with local, landscape, and climate variables wetlands across a large geographic range few barriers. We sampled North Dakota, New Mexico, Texas (USA) 2021 Dakota Mexico 2022. used an array hydrographic, climate, spatial relate taxonomic functional community composition diversity conditions. Taxonomic was overwhelmingly different among states between years: landscape‐scale refuge availability explained variation composition, local climate‐scale only within context variables. Trait similar most sampling groups, distinct trait assemblages occurred No predictor variable matrix alone, arrangement predicted when considering overlapping Taxa indices were associated increased at landscape scale. Our results show consistent structure geographical scale hydrologically wetlands, despite almost complete turnover regions. Patterns imply incorporating multiple scales critical composition. Despite regimes potential for connectivity via dispersal, taxa replacement high regions single grassland macrosystem. overall change provided suite structuring Further, cases, elicits response

Language: Английский

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