Temporal Changes in Freshwater Invertebrate Communities During the Drying Phase of a Newly Intermittent River in Central Italy DOI Open Access
Antonio Di Sabatino,

Floriana Rossi,

Giada Ercolino

et al.

Environments, Journal Year: 2024, Volume and Issue: 11(12), P. 295 - 295

Published: Dec. 20, 2024

The transition from a perennial to an intermittent regime in newly rivers (nIRs) negatively affects both taxonomic and functional diversity, with significant repercussions on freshwater ecosystem processes services. However, better understand how changes the natural flow may influence structure functioning of ecosystems, it is fundamental assess variations abiotic biotic parameters throughout hydrological phases characterizing nIRs. For these reasons, we evaluated temporal community composition during drying phase Central Apennines stream (Italy) over two consecutive drought years. We demonstrated that different pre-drought profoundly affected communities. reduced discharge low-flow conditions 2024 led insect- non-insect-dominated communities, small-sized, lentic-adapted generalist taxa replacing rheophile more sensitive insect taxa. also found marked interannual differences beta diversity. years, richness did not exhibit negative stepped response pattern sequence channel contraction, cessation pools formation. Consequently, can assume Apennine rivers, communities strictly dependent local variable context. This study emphasizes need for further investigation ecological impacts increasing intermittence formerly streams rivers.

Language: Английский

Exploring macroinvertebrate community assembly rules: unraveling the effects of flow intermittency and poor ecological potential on environmental filtering and limiting similarity through functional traits DOI Creative Commons
Júlia Szeles, Viktória B‐Béres, Tamás Bozóki

et al.

Hydrobiologia, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 30, 2025

Language: Английский

Citations

0
Hidden results of functional diversity in macroinvertebrates: Trait-groups specific response to flow intermittency in lowland streams DOI
Pál Boda, Júlia Szeles, Áron Lukács

et al.

Inland Waters, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 16

Published: Aug. 23, 2024

As global flow intermittency increases, understanding how macroinvertebrates respond at a functional level in streams becomes crucial for effective water management. This study investigates the response of to Hungarian lowland over 10-month period, comparing intermittent and perennial across entire community, trait groups, states. We aimed demonstrate differences diversity using metrics such as richness, evenness, divergence, dispersion, Rao's quadratic entropy. For we focused on both stable traits, anticipating greater traits. Additionally, identified which states, indicated by community-weighted means, contribute significantly variations between streams. Our findings indicate that is generally lower or equivalent streams, suggesting disparities composition. Significant were observed within indicating specific responses groups intermittency. resilience states—including current velocity, reproduction, respiration, female length, locomotion, substrate relation, aquatic stages, resistance forms—that contributed these differences. The three-level analysis revealed hidden relationship: state do not consistently manifest group whole community levels. Investigating changes can serve an early indicator shifts. Incorporating indices into assessment frameworks could facilitate detection during bioassessment. recommend considering when evaluating future studies.

Language: Английский

Citations

0
Dry season refuges, refugia and flow‐regime change in Mediterranean climate streams DOI Creative Commons
Nicole Carey,

Edwin T. Chester,

Belinda J. Robson

et al.

Freshwater Biology, Journal Year: 2024, Volume and Issue: 69(11), P. 1607 - 1626

Published: Sept. 23, 2024

Abstract Climate change is causing stream flow regimes to in many regions globally, including southwestern Australia (SWA) where perennial streams have switched intermittent regimes. In drier landscapes, ecological refuges and evolutionary refugia will become critical for conserving freshwater biodiversity. This study aimed determine the contribution of dry season species persistence community recovery a forested headwater catchment been exposed severe permanent drying, them intermittent. That is, formerly no drought were present. Macroinvertebrate assemblages sampled within recently streams. Refuges included small spring‐fed pools, perched pools subterranean associated with granite inselbergs. Dry streambeds searched organisms aestivating situ, sediments collected from each rehydration. Mantel tests used compare early wet when had begun flow. Analysis similarities was patterns between single remaining catchment, infer Refuge types very different assemblages: supported several locally endemic species, but dominated by opportunistic colonists. Several taxa found sediments, primarily adult Coleoptera larval Chironomidae. Inselberg springs populations Trichoptera Ephemeroptera provided refuge an amphipod. However, did not significantly contribute recovery. Rather, winter flows similar those inhabiting stream, showing that recolonisation likely primary process these Newly formed some also colonising absent (or rare) all perennial. continued loss SWA result landscape‐wide reductions diversity (as colonisation sources are lost), because there known this landscape relictual retreat into. Granite inselbergs may few as lost. play pivotal role able use them; however, existence under threat prolonged climatic newly dry. Thus, identification protection future matter urgency facing climates, it ultimately reservoirs biodiversity

Language: Английский

Citations

0
Temporal Changes in Freshwater Invertebrate Communities During the Drying Phase of a Newly Intermittent River in Central Italy DOI Open Access
Antonio Di Sabatino,

Floriana Rossi,

Giada Ercolino

et al.

Environments, Journal Year: 2024, Volume and Issue: 11(12), P. 295 - 295

Published: Dec. 20, 2024

The transition from a perennial to an intermittent regime in newly rivers (nIRs) negatively affects both taxonomic and functional diversity, with significant repercussions on freshwater ecosystem processes services. However, better understand how changes the natural flow may influence structure functioning of ecosystems, it is fundamental assess variations abiotic biotic parameters throughout hydrological phases characterizing nIRs. For these reasons, we evaluated temporal community composition during drying phase Central Apennines stream (Italy) over two consecutive drought years. We demonstrated that different pre-drought profoundly affected communities. reduced discharge low-flow conditions 2024 led insect- non-insect-dominated communities, small-sized, lentic-adapted generalist taxa replacing rheophile more sensitive insect taxa. also found marked interannual differences beta diversity. years, richness did not exhibit negative stepped response pattern sequence channel contraction, cessation pools formation. Consequently, can assume Apennine rivers, communities strictly dependent local variable context. This study emphasizes need for further investigation ecological impacts increasing intermittence formerly streams rivers.

Language: Английский

Citations

0