Spawning cohort trade‐offs of reproductive time and output in cyprinid fish along an elevation gradient DOI
Xingchen Liu, Chengzhi Ding, Nick Bond

et al.

Ecology Of Freshwater Fish, Journal Year: 2023, Volume and Issue: 33(2)

Published: Dec. 7, 2023

Abstract Understanding environmental requirements for fish reproduction in natural habitats is crucial population conservation and restoration. However, such information extremely scarce the highly threatened schizothoracine fishes that cover large elevation ranges on Tibetan Plateau. This research investigated spawning time, output conditions of wild Schizopygopsis thermalis along an elevational gradient (i.e., from 1766 to 4372 m) upper Nu‐Salween River. It found grounds S. were mainly located at elevations between 3600 m, mostly consist still marginal areas (still water <10 cm deep) with gravel substrates. Otolith microstructure analysis revealed, first spawns two seasons winter: December next February, spring: April May), winter period generally longer than spring period. Winter started earlier ended higher elevations, while occurred lower but simultaneously elevations. As increases, reproductive also cohorts shift winter‐dominant spring‐dominant. associated temperatures discharges cohort, both showed elevation‐related preferences. Our results suggest can adapt strategies conditions, which fill gaps characteristics fishes, highlight importance conserving high Qinghai‐Tibetan rivers.

Language: Английский

Convolutional Neural Networks Facilitate River Barrier Detection and Evidence Severe Habitat Fragmentation in the Mekong River Biodiversity Hotspot DOI Creative Commons
Jingrui Sun, Chengzhi Ding, Martyn C. Lucas

et al.

Water Resources Research, Journal Year: 2024, Volume and Issue: 60(1)

Published: Jan. 1, 2024

Abstract Construction of river infrastructure, such as dams and weirs, is a global issue for ecosystem protection due to the fragmentation habitat hydrological alteration it causes. Accurate barrier databases, increasingly used determine ecologically sensitive management, are challenging generate. This especially so in large, poorly mapped basins where only large tend be recorded. The Mekong one world's most biodiverse but, like many rivers, impacts on from infrastructure documented. To demonstrate solution this, enable more basin we generated whole‐basin database Mekong, by training Convolutional Neural Network (CNN)–based object detection models, best which was identify 10,561 previously unrecorded barriers. Combining manual revision merged with existing database, our new Basin contains 13,054 Existing databases Lower documented under ∼3% barriers recorded CNN combined checking. Nam Chi/Nam Mun region, eastern Thailand, fragmented area within basin, median [95% CI] density 15.53 [0.00–49.30] per 100 km, Catchment Area‐based Fragmentation Index value, calculated an upstream direction, 1,178.67 [0.00–6,418.46], construction sluice gates. CNN‐based framework effective potentially can transform ability across facilitate ecologically‐sensitive management.

Language: Английский

Citations

14
Fishery and agriculture amidst human activities and climate change in the Mekong River: A review of gaps in data and effective approaches towards sustainable development DOI
Khosro Morovati,

Fuqiang Tian,

Yadu Pokhrel

et al.

Journal of Hydrology, Journal Year: 2024, Volume and Issue: unknown, P. 132043 - 132043

Published: Sept. 1, 2024

Language: Английский

Citations

5
Exploring key drivers of Chinese sturgeon spawning sites fragmentation in the Yangtze River: Insights into spawning window DOI

Qianqian Wang,

Yu Zhong, Guo‐An Yu

et al.

Ecological Engineering, Journal Year: 2025, Volume and Issue: 213, P. 107563 - 107563

Published: Feb. 16, 2025

Language: Английский

Citations

0
Widespread and strong impacts of river fragmentation by human barriers on fishes in the Mekong River Basin DOI Creative Commons
Jingrui Sun, Damiano Baldan, Martyn C. Lucas

et al.

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: March 5, 2025

Abstract The Mekong River, a global freshwater biodiversity hotspot, has suffered from intensive barrier construction, resulting in major challenges safeguarding its fauna. Here, we provide comprehensive evaluation of the impacts river barriers on distribution 1,032 fish species Basin. Our analysis revealed that 93% suffer habitat fragmentation, and with larger range requirements experienced higher fragmentation impacts. Sub-basins along main channel Lower had high values richness but relatively Across all migration types, potamodromous worst status (Fragmentation Index, 42.56 [95% CI, 36.95–46.05]), followed by catadromous fish. Among IUCN conservation categories, Critically Endangered highest index (33.34 [12.53–46.40]). small dams sluice gates contribute more to than large dams.

Language: Английский

Citations

0
Sediment eDNA reveals damming triggered changes in algal and fish communities at the Three Gorges Reservoir in China DOI
Yanlin Li,

Jiaojiao Yang,

Yuchun Wang

et al.

Environmental Research, Journal Year: 2025, Volume and Issue: unknown, P. 121474 - 121474

Published: March 1, 2025

Language: Английский

Citations

0
Geodiversity as a surrogate to inform freshwater fish diversity conservation and management DOI

Jie Wang,

Juan Tao, Jani Heino

et al.

Journal of Applied Ecology, Journal Year: 2025, Volume and Issue: unknown

Published: April 17, 2025

Abstract Geodiversity offers novel insights into biodiversity patterns and their underlying mechanisms, thereby contributing to the development of conservation strategies amid widespread environmental changes human disturbances. However, relationship between geodiversity remains largely unexplored, particularly in freshwater ecosystems. Here, we investigated extent which accounts for fish diversity across dimensions (taxonomic, functional phylogenetic) levels (alpha beta) Lancang‐Mekong River. We first compiled three datasets (i.e. occurrence records, traits phylogenetic relations) seven geofeature group discharge, waterbody, topography, terrestrial cover, landform, soil rock) catchment. Multidimensional were then calculated at alpha beta levels, respectively. Next, assessed influence on multidimensional corresponding using generalized linear mixed models (GLMMs) structural equation modelings (SEMs). showed contrasting with showing positive upriver‐downriver gradients, but negative gradients along river continuum. The spatial congruence was weak geofeatures levels. substantially accounted variance both conditional R 2 GLMMs ranging from 0.892 0.996. increase primarily driven by growing variability discharge waterbody types, while mainly influenced rising dissimilarity types. SEMs revealed that indirect effects generally weak. Synthesis applications . Our findings emphasize profound large rivers, revealing its central role shaping through enhancing heterogeneity resource availability. To sustain diversity, it is crucial maintain types preserve linkages among components. Integrating programmes provides a robust framework ensuring ecosystem resilience functionality guiding management restoration globally, face rapid changes.

Language: Английский

Citations

0
Analysing spatio‐temporal patterns of non‐native fish in a biodiversity hotspot across decades DOI Creative Commons
Jie Wang, Chengzhi Ding, Jani Heino

et al.

Diversity and Distributions, Journal Year: 2023, Volume and Issue: 29(11), P. 1492 - 1507

Published: Sept. 25, 2023

Abstract Aim Analysing the spatio‐temporal patterns and dynamics of non‐native species is essential to understanding mechanisms underlying successful invasions developing effective management strategies. Yet, such analyses generally neglect influence receiving ecosystem types sources (i.e. alien species, non‐natives originating outside concerned region; translocated introduced locations their historical range within region). Location Yunnan, China. Methods We analysed long‐term (1950–2022) potential fishes in a biodiversity hotspot (Yunnan, China), paying special attention waterbody comparing species. did this through compiling highly comprehensive occurrence dataset native fishes. Results recorded 783 94 (49 45 species), which mainly belonged order Cypriniformes (52 species) were via purposes for advancing aquaculture. Most frequently encountered either intentionally aquaculture or small‐bodied fish unintentionally activities. The richness spatial ranges increased consistently since 1950s demonstrated pronounced change after 2000s, with densely populated areas middle lower reaches large rivers being more profoundly affected. number records exceeded 2000s. Lakes reservoirs are hotspots both introductions, watersheds Yunnan (e.g. Jinsha‐Yangtze Lancang‐Mekong basins) contained fish. Main Conclusions Our study highlights need consider invasion sensitivities ecosystems pay intra‐regional translocations when prevention strategies against particularly important around world.

Language: Английский

Citations

9
Human barriers fragment three-quarters of all rivers in the Mekong basin DOI

Mingbo Li,

Jingrui Sun, Damiano Baldan

et al.

Renewable and Sustainable Energy Reviews, Journal Year: 2024, Volume and Issue: 210, P. 115158 - 115158

Published: Dec. 4, 2024

Language: Английский

Citations

2
Thermal exposure risk in different life stages of Chinook salmon in the Nechako River system, British Columbia DOI
Muhammed A. Oyinlola, Mostafa Khorsandi, Noa B. Mayer

et al.

Climatic Change, Journal Year: 2024, Volume and Issue: 177(12)

Published: Dec. 1, 2024

Language: Английский

Citations

1
Assessing the conservation status of Chinese freshwater fish using deep learning DOI
Jinnan Chen, Chengzhi Ding, Dekui He

et al.

Reviews in Fish Biology and Fisheries, Journal Year: 2023, Volume and Issue: 33(4), P. 1505 - 1521

Published: July 8, 2023

Language: Английский

Citations

3