Eutrophication increases the similarity of cyanobacterial community features in lakes and reservoirs

Water Research, Journal Year: 2023, Volume and Issue: 250, P. 120977 - 120977

Published: Dec. 6, 2023

Language: Английский

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The relationships between biotic uniqueness and abiotic uniqueness are context dependent across drainage basins worldwide

Landscape Ecology, Journal Year: 2024, Volume and Issue: 39(4)

Published: April 5, 2024

Abstract Context Global change, including land-use change and habitat degradation, has led to a decline in biodiversity, more so freshwater than terrestrial ecosystems. However, the research on freshwaters lags behind marine studies, highlighting need for innovative approaches comprehend biodiversity. Objectives We investigated patterns relationships between biotic uniqueness abiotic environmental drainage basins worldwide. Methods compiled high-quality data aquatic insects (mayflies, stoneflies, caddisflies at genus-level) from 42 spanning four continents. Within each basin we calculated (local contribution beta diversity, LCBD) of insect assemblages, types heterogeneity, LCEH), categorized into upstream land cover, chemical soil properties, stream site landscape position, climate. A mixed-effects meta-regression was performed across examine variations strength LCBD-LCEH relationship terms latitude, human footprint, major continental regions (the Americas versus Eurasia). Results On average, LCBD LCEH were weak. direction varied among basins. Latitude, footprint index, or location did not explain significant variation relationship. Conclusions detected strong context dependence Varying conditions gradient lengths basins, historical contingencies, stochastic factors may these findings. This underscores basin-specific management practices protect biodiversity riverine systems.

Language: Английский

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Patterns in and predictors of stream and river macroinvertebrate genera and fish species richness across the conterminous USA

Knowledge and Management of Aquatic Ecosystems, Journal Year: 2023, Volume and Issue: 424, P. 19 - 19

Published: Jan. 1, 2023

Both native and non-native taxa richness patterns are useful for evaluating areas of greatest conservation concern. To determine those patterns, we analyzed fish macroinvertebrate data obtained at 3475 sites collected by the USEPA's National Rivers Streams Assessment. We also determined which natural anthropogenic variables best explained in regional richness. Macroinvertebrate increased with number sampled per region. Therefore, residual from deviation observed predicted given Regional markedly exceeded average site both macroinvertebrates fish. Predictors macroinvertebrate-genus fish-species residual-regional differed. Air temperature was an important predictor cases but positive negative macroinvertebrates. land use were significant predictors This study is first to mean aquatic across conterminous USA, key drivers Thus, it offers insights into USA biodiversity hotspots.

Language: Английский

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A time-calibrated ‘Tree of Life’ of aquatic insects for knitting historical patterns of evolution and measuring extant phylogenetic biodiversity across the world

Earth-Science Reviews, Journal Year: 2024, Volume and Issue: 252, P. 104767 - 104767

Published: April 2, 2024

The extent to which the sequence and timing of important events on Earth have influenced biological evolution through geological time is a matter ongoing debate. In this context, phylogenetic history aquatic insects remains largely elusive, our understanding their chronology fragmentary incomplete at best. Here, after gathering comprehensive data matrix 3125 targeted rRNA protein-coding gene sequences from nine independent portions, we built well-supported time-calibrated tree comprising almost 1200 genera that represent large proportion extant families dragonflies damselflies (Odonata), mayflies (Ephemeroptera), stoneflies (Plecoptera), caddisflies (Trichoptera). We reviewed main evolutionary historical scenarios for each insect lineage as revealed by best-scoring molecular topology, major ancient radiations, calibrated divergence estimates, in related spatial arrangement land masses, continental drift, mass extinctions. Molecular dating using birth-death model speciation, with lognormal-relaxed informed transcriptomic constraints, suggested (i) first radiated approximately 220 million years (Ma) ago most lineages thrived independently Triassic–Jurassic (Tr–J) extinction event; (ii) underwent bursts diversification during Cretaceous; (iii) ancestral separating stonefly suborders Arctoperlaria Antarctoperlaria was consistent geographical isolation vicariant fragmentation tectonic splitting supercontinent Pangaea around 170 Ma ago; (iv) recent common ancestors extended back Pangaea, supporting earliest offshoot 'retreat-making' Annulipalpia sister relationship between predatory free-living Rhyacophilidae Hydrobiosidae. Our 'Tree Life' also resolved shallow relationships key innovations, such convergent exophytic oviposition or Jurassic origins burrowing lifestyle mayflies. study, illustrate how phylogeny can help integrate aspects biogeographical ecological research across world. To do so, used three empirical datasets stream subarctic Finland, northeastern Spain, southeastern Tibet exemplary cases. These examples application tested ecogeographical mechanisms responses size structural resemblances patterns relatedness uniqueness along elevational flow-intermittence gradients, respectively. emphasise specific details capturing different variation are dependent geological, geographical, environmental contexts drainage basins. finally highlight potential venues future research, including evaluations diversity space time, characters relation palaeoclimatic variation, development complementary algorithms conservation prioritisation evolutionarily valuable bioregions insects. Overall, hope work will stimulate multidisciplinary efforts among areas biogeosciences towards safeguarding heritage

Language: Английский

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EGCop: An Expert‐Curated Occurrence Dataset of European Groundwater‐Dwelling Copepods (Crustacea: Copepoda)

Global Ecology and Biogeography, Journal Year: 2025, Volume and Issue: 34(1)

Published: Jan. 1, 2025

ABSTRACT Motivation Subterranean biodiversity is increasingly threatened by multiple intertwined anthropogenic impacts, including habitat loss, pollution, overexploitation of resources, biological invasions and climate change. Worryingly, subterranean still poorly represented in conservation agendas, also due to persisting gaps our knowledge the organisms thriving often‐secluded difficult‐to‐access ecosystems. This even more apparent for small‐sized (body size < 1 mm) groundwater‐dwelling metazoans, among which copepods (Crustacea: Copepoda) represent dominant group terms both species richness biomass. We present a dataset 6986 occurrence records 588 species/subspecies European obligate copepods. curated all make their taxonomy consistent with current systematics Copepoda, while assessing uncertainty geographic coordinates coupling in‐depth web literature searches GIS analyses. suggest data provided can be used explore range eco‐evolutionary questions—from drivers distribution groundwater fauna assembly communities—as well as prompt more. Main Types Variables Contained Occurrence copepods, details about specimen taxonomy, source record, locality type. Spatial Location Grain Geographical Europe (including western Russian Federation), along Turkey Georgia. were assigned projected (EPSG:3035) at 100 m resolution but varying spatial uncertainty. Time Period 1907–2017. Major Taxa Level Measurement Crustacea: Copepoda. Most have species‐level identification, some them are identified subspecies level. Software Format Comma‐separated values file (.csv) Excel (.xlsx), UTF‐8 encoding meta‐data following Darwin Core standard.

Language: Английский

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Deciphering the Patterns and Correlates of Zooplankton Functional Diversity in Mountain and Lowland Ponds

Freshwater Biology, Journal Year: 2025, Volume and Issue: 70(1)

Published: Jan. 1, 2025

ABSTRACT Biodiversity studies have usually been conducted considering only the taxonomic dimension of ecological communities. However, diversity measurements taking into account functional traits species may be more sensitive in capturing aspects community functioning that are not apparent with traditional approach. Functional (either based on alpha or beta levels) is, therefore, a facet provides link between ecosystem and structure an important metric for assessing impact global change context applied conservation schemes. Zooplankton is key element lentic ecosystems due to its linkage primary producers secondary consumers. Here, we tried disentangle spatial patterns correlates zooplankton along relatively wide altitudinal gradient (700–2100 m a.s.l.) across central northwestern Spain. We also identified environmental controls extensive set lowland (48) mountain (28) ponds sampled 2004–2005 2007–2008, respectively. assessed whether replacement richness differences drove overall evaluated relative contributions geographical distances variation diversity. Our findings highlighted importance filtering increasing elevation, leading potentially concomitant decrease values. was related changes patterns, which were mostly result pure loss gain both ponds. suggest eutrophication associated agricultural development main factor underlying homogenisation communities Local strongly dominant trait difference component than distances. This study supports prediction elevation fosters different functions. results local conditions determining architecture communities, physiologically extreme environments (mountains) areas suffering from pressures processes. fraction characterising relationships generally low. suggests prevalence idiosyncratic responses random stochastic events structuring composition freshwater

Language: Английский

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Seasonal variation and driving factors of beta diversity of macroinvertebrate assemblages in subtropical Chinese high-mountain streams

Water Biology and Security, Journal Year: 2025, Volume and Issue: unknown, P. 100379 - 100379

Published: March 1, 2025

Language: Английский

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Tropical Niche Conservatism and Dispersal Limitation Jointly Determine Taxonomic and Phylogenetic β‐Diversities of Odonata in Eastern China

Global Ecology and Biogeography, Journal Year: 2025, Volume and Issue: 34(3)

Published: March 1, 2025

ABSTRACT Aim Tropical niche conservatism (TNC) and dispersal limitation (DL) are major ecological evolutionary mechanisms in shaping taxonomic phylogenetic β‐diversities. While these have been studied plants vertebrates, their roles freshwater taxa remain unclear. We leveraged Odonata species distribution data to map geographical patterns of β‐diversities, determine whether β‐diversity is primarily shaped by TNC or DL temperature seasonality a key driver determining TNC. Location Eastern China. Time Period Present. Major Taxa Studied Odonata. Methods A moving window containing nine grids 50 × km was employed quantify including turnover nestedness components. null model utilised calculate randomly expected based on observed site‐specific regional pools. The generalised dissimilarity used assess the climatic geographic distances identify factors. Results Taxonomic total its component were generally higher than most communities, with being relatively mainly tropical regions. Current factors independently explained slightly more variation distance alone, while greater proportions deviance However, joint effects accounted for an even larger part β‐diversity. predictors seasonality. Main Conclusions factors, particularly seasonality, largely shape β‐diversities communities. Spatial along gradient tends involve phylogenetically related taxa, resulting overall β‐diversity, supporting highlight climate, interacting topographic complexity, eastern

Language: Английский

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Darwinian shortfall and macroecological patterns in genetic data of Tocantins-Araguaia basin fishes

Neotropical Ichthyology, Journal Year: 2025, Volume and Issue: 23(1)

Published: Jan. 1, 2025

Abstract Genetic information is crucial for species identification, population genetics structure, evolutionary relationships, and biodiversity monitoring. It helps address gaps related to Linnean (taxonomic uncertainty) Darwinian (phylogenetic knowledge) shortfalls. Understanding these can guide data collection reduce This study focuses on compiling genetic 748 fish in the Tocantins-Araguaia basin, examining number of unique genomic regions individual sampled per species. We also investigated factors that determine availability by linking it with macroecological predictors. Our findings reveal fewer than one-third endemic have resources available. The shortfall - lack phylogenetic knowledge a key factor limiting data, experiencing more this having less information. underscores need increased sampling better assess biological like structure.

Language: Английский

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Addressing Knowledge Shortfalls in Conservation Science: A long way to go, as quickly as possible

Biological Conservation, Journal Year: 2023, Volume and Issue: 287, P. 110314 - 110314

Published: Oct. 3, 2023

Language: Английский

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