Prospects for conserving freshwater fish biodiversity in the Anthropocene: A view from Southern China DOI Creative Commons

David Dudgeon

Integrative Conservation, Год журнала: 2024, Номер 3(4), С. 294 - 311

Опубликована: Дек. 1, 2024

Abstract Globally, population declines of freshwater animals have been consistently greater than counterparts in other realms, making fresh waters hot spots endangerment—particularly for larger species. Furthermore, biotas become increasingly homogenized as invasions by non‐native species proceed. These trends are particularly evident Anthropocene China, where humans profoundly altered ecosystems, with serious consequences fishes and aquatic vertebrates. Here, I examine the prospects ‘bending curve’ or reversing trend fish biodiversity loss focusing on examples from Yangtze further south. Much China's rich is threatened, but a lack contemporary surveys means that conservation status many uncertain, ~40% data deficient. Although nutrient pollution major rivers has abated recently, poor water quality remains concern, widespread proliferation emerging contaminants microplastics can be expected to unpredictable (but detrimental) effects biota. Warmer temperatures will exacerbate toxicity micropollutants, facilitate spread supplanting native fishes. Extensive dam construction fragmented rivers, blocked migrations, preventing access spawning sites leading extirpations. Dams limit ability adjust their ranges compensate global warming, increased drought severity frequency under climate change representing an existential threat. Overexploitation reduced recent introduction 10‐year fishing ban basin, dams, flow regulation, continuing habitat degradation stymie any recovery significant result ban. captive breeding release programmes failed restore populations threatened because management stock allowed inbreeding hybridization genetic wild populations. Other anthropogenic activities, such large‐scale mining river sand flood plain—exacerbated sediment‐trapping upstream dams—are persistent obstacles China.

Язык: Английский

Non-native freshwater molluscs: a brief global review of species, pathways, impacts and management strategies DOI
Manuel Lopes‐Lima,

André Lopes-Lima,

Lyubov E. Burlakova

и другие.

Hydrobiologia, Год журнала: 2025, Номер unknown

Опубликована: Янв. 22, 2025

Язык: Английский

Процитировано

4
Growth and Diet of Northern Pike (Esox lucius) in Boreal Lakes: Implications for Ecosystem Management DOI Creative Commons
Sebastian Theis,

Jesse R. Shirton,

Myriam A. Barbeau

и другие.

Hydrobiology, Год журнала: 2025, Номер 4(1), С. 1 - 1

Опубликована: Янв. 2, 2025

An important top-down predator, the northern pike (Esox lucius), faces harsh environmental conditions in boreal ecoregion. They are often managed for recreational fishing and, more recently, to create offsets; strategies aimed at balancing ecological impacts by enhancing or restoring habitats. Our study examines populations two remote lakes Alberta: Steepbank and Wappau. The differ size, vegetation cover, trophic status, providing a natural experiment investigating growth, condition, diet, population density. Over three years (2018–2020), were sampled using gill nets. Population metrics, including stomach contents, compared between lakes. Steepbank, smaller, oligotrophic lake with low showed lower prey fish densities larger, eutrophic Wappau, but it did not catch per unit effort. Growth rates body condition varied significantly lakes, Wappau exhibiting faster growth better older age groups, while younger had higher relative weights. A diet analysis revealed significant differences consumption: displayed of conspecific predation invertebrate consumption, particularly classes. These findings highlight how characteristics availability shape dynamics, offering valuable insights management approaches Alberta.

Язык: Английский

Процитировано

0
Impact of Temperature Manipulations on Growth Performance, Body Composition, and Selected Genes of Koi Carp (Cyprinus carpio koi) DOI Creative Commons

Kennedy Emeka Amuneke,

Ahmed A. Elshafey, Yuanhao Liu

и другие.

Fishes, Год журнала: 2025, Номер 10(3), С. 95 - 95

Опубликована: Фев. 24, 2025

Aquatic organisms face substantial challenges from climate change, particularly due to rising water temperatures, which significantly impact their growth and survival. This investigation utilized 960 Koi carp (Cyprinus carpio koi) (Initial Body Weight, 0.304 ± 0.005 g). After a 10-day acclimatization period, the fish were distributed equally across 12 glass aquaria (80 × 40 45 cm), with three replicates per treatment. study encompassed two phases. The first phase (10–60 Days Post-Hatching, dph) involved four temperature regimes: T1 (26 °C), T2 (28 T3 (30 T4 (26/30 °C daily fluctuation). second (60–120 maintained all groups at 30 °C. Initially, exhibited best performance, indicated by highest Final Weight Gain, Specific Growth Rate (SGR), Thermal Coefficient (TGC), along survival rate. Gene expression analysis revealed that HSP70, HSP90, SOD, BCL-2, FASN upregulated in T4, indicative of stress, while MYOD was T1. During phase, displayed superior healthier body composition elevated moisture protein, reduced fat content compared T2. BCL-2 increased T1, suggesting thermal whereas levels rose treatments, peaking correlated its growth. Further, there strong relationships among parameters, gene expression, composition, exhibiting essential non-essential amino acids unique fatty acid profile. Overall, results suggest manipulated influences carp’s characteristics, making it more adaptable future environmental stress.

Язык: Английский

Процитировано

0
Ecological correlates of taxonomic and functional beta diversity of wetland breeding birds in central part of Inner Mongolia wetlands DOI Creative Commons
Ling‐Ying Shuai, Yuxin Luo,

Yue Luo

и другие.

Ecological Indicators, Год журнала: 2025, Номер 172, С. 113302 - 113302

Опубликована: Март 1, 2025

Язык: Английский

Процитировано

0
Riverine Barrier Removals Could Proliferate Biological Invasions DOI Open Access

Ellen J. Dolan,

Ismael Soto, Jaimie T. A. Dick

и другие.

Global Change Biology, Год журнала: 2025, Номер 31(3)

Опубликована: Март 1, 2025

Multiple stressors, such as pollution, climate change, invasive species and fragmentation, threaten global ecosystems, requiring holistic management actions. Freshwater ecosystems are disproportionately biodiverse particularly impacted by fragmentation biological invasions. Artificial barriers, dams weirs, long-standing features of landscapes, with a divergence views on their benefits disbenefits. Recognition the negative impacts barriers river continuum native biota, for migratory aquatic species, has led to rapid rate barrier removals in recent decades, especially North America Europe. However, since rise riverine construction centuries ago, invasion rates have concurrently surged. can paradoxically slow spread through freshwaters, removal efforts thus risk proliferating that disperse rapidly connected habitats. Despite well-intended plans restoration removals, subsequent colonisation been largely overlooked. This presents 'connectivity conundrum': intuitively addresses issues migrations dispersals, but could perversely exacerbate species. Basin-scale data collection around short- long-term will help underpin future projects maximise potential beneficial outcomes

Язык: Английский

Процитировано

0
Rice Fields and Aquatic Insect Biodiversity in Italy: State of Knowledge and Perspectives in the Context of Global Change DOI Open Access
Tiziano Bo, Anna Marino, Simone Guareschi

и другие.

Water, Год журнала: 2025, Номер 17(6), С. 845 - 845

Опубликована: Март 15, 2025

Rice fields are one of the most important and extensive agro-ecosystems in world. Italy is a major non-Asian rice producer, with significant proportion its yield originating from vast area within Po Valley, region nourished by waters Alps. While biodiversity these has been extensively documented for certain faunal groups, such as birds, there remains paucity research on aquatic insects. A further challenge limited dissemination findings, which have primarily published “gray” literature (local journals, newsletters similar). Moreover, particular significance field invasion biology, given their role arrival spread alien species. efficacy substitute now-disappeared lowland natural environments well documented, it equally evident that traditional rice-growing techniques can require an unsustainable use water resources, threatens surrounding lotic systems. Here, we summarize review multiple sources entomological information Italian fields, analyzing both publications ISI journals papers local (gray literature). In near future, strategies reduce demand irrigation, promote cultivation drought-tolerant crops, utilize precision farming will be implemented. The balancing need to withdrawal rivers maintenance wetlands where possible support this pivotal component regional biodiversity.

Язык: Английский

Процитировано

0
A systematic map of hydropower impacts on megafauna at the land-water interface DOI Creative Commons
Vassil Y. Altanov, Sonja C. Jähnig, Fengzhi He

и другие.

Biological Conservation, Год журнала: 2025, Номер 305, С. 111092 - 111092

Опубликована: Март 24, 2025

Язык: Английский

Процитировано

0
Monitoring Atlantic Salmon (Salmo salar) Smolt Migration in a Large River System Using Environmental DNA DOI Creative Commons
Louarn Fauchet, Martin Laporte, Isabeau Caza‐Allard

и другие.

Environmental DNA, Год журнала: 2025, Номер 7(2)

Опубликована: Март 1, 2025

ABSTRACT Effective monitoring strategies are key for aquatic species conservation, but traditional methods often require significant resources, especially in large systems. The emergence of quantitative environmental DNA (eDNA) is a promising alternative. Yet, few studies have evaluated the possibility quantifying Atlantic salmon abundance with eDNA when individuals at low and occur river In this study, we tested efficacy to monitor quantify daily variation smolt counts during their downstream migration system smolts. During 2021 2022 migrations, trap nets were used conduct census smolts Romaine Puyjalon rivers (Québec, Canada) while samples collected over transect perpendicular riverbank. Using real‐time qPCR, showed that discharge‐corrected concentrations positively correlated both years. addition, found controlling temperature precipitation improved model transferability between years, showing importance considering correlates using quantification. Finally, on same day, not 1 or 2 days prior, highlighting capacity track fluctuations abundance. Our results underscore potential systems hydrology conditions documented.

Язык: Английский

Процитировано

0
Prospects for conserving freshwater fish biodiversity in the Anthropocene: A view from Southern China DOI Creative Commons

David Dudgeon

Integrative Conservation, Год журнала: 2024, Номер 3(4), С. 294 - 311

Опубликована: Дек. 1, 2024

Abstract Globally, population declines of freshwater animals have been consistently greater than counterparts in other realms, making fresh waters hot spots endangerment—particularly for larger species. Furthermore, biotas become increasingly homogenized as invasions by non‐native species proceed. These trends are particularly evident Anthropocene China, where humans profoundly altered ecosystems, with serious consequences fishes and aquatic vertebrates. Here, I examine the prospects ‘bending curve’ or reversing trend fish biodiversity loss focusing on examples from Yangtze further south. Much China's rich is threatened, but a lack contemporary surveys means that conservation status many uncertain, ~40% data deficient. Although nutrient pollution major rivers has abated recently, poor water quality remains concern, widespread proliferation emerging contaminants microplastics can be expected to unpredictable (but detrimental) effects biota. Warmer temperatures will exacerbate toxicity micropollutants, facilitate spread supplanting native fishes. Extensive dam construction fragmented rivers, blocked migrations, preventing access spawning sites leading extirpations. Dams limit ability adjust their ranges compensate global warming, increased drought severity frequency under climate change representing an existential threat. Overexploitation reduced recent introduction 10‐year fishing ban basin, dams, flow regulation, continuing habitat degradation stymie any recovery significant result ban. captive breeding release programmes failed restore populations threatened because management stock allowed inbreeding hybridization genetic wild populations. Other anthropogenic activities, such large‐scale mining river sand flood plain—exacerbated sediment‐trapping upstream dams—are persistent obstacles China.

Язык: Английский

Процитировано

0