Опубликована: Янв. 1, 2024
Язык: Английский
Global Change Biology, Год журнала: 2022, Номер 28(14), С. 4276 - 4291
Опубликована: Апрель 20, 2022
Abstract Identifying climate refugia is key to effective biodiversity conservation under a changing climate, especially for mountain‐specialist species adapted cold conditions and highly threatened by warming. We combined distribution models (SDMs) with forecasts identify high‐elevation bird ( Lagopus muta , Anthus spinoletta Prunella collaris Montifringilla nivalis ) in the European Alps, where ecological effects of changes are particularly evident predicted intensify. considered future (2041–2070) (SSP585 scenario, four models) identified three types refugia: (1) in‐situ potentially suitable both current conditions, ex‐situ (2) only according all or (3) at least out conditions. SDMs were based on very large, high‐resolution occurrence dataset (2901–12,601 independent records each species) collected citizen scientists. fitted using different algorithms, balancing statistical accuracy, realism predictive/extrapolation ability. selected most reliable ones consistency between training testing data extrapolation over distant areas. Future predictions revealed that (with partial exception A. will undergo range contraction towards higher elevations, losing 17%–59% their (larger losses L. ). ~15,000 km 2 Alpine region as species, which 44% currently designated protected areas (PAs; 18%–66% among countries). Our findings highlight usefulness spatially accurate scientists, importance model extrapolating Climate refugia, partly included within PAs system, should be priority sites habitats, habitat degradation/alteration human activities prevented ensure suitability alpine species.
Язык: Английский
Процитировано
57
Ecological Informatics, Год журнала: 2024, Номер 82, С. 102703 - 102703
Опубликована: Июнь 29, 2024
Dissolved organic matter (DOM) acts as a chemical intermediary between terrestrial and lacustrine ecosystems significantly affects the structure function of lakes. The trophic state lakes, driven by input phytoplankton biomass, alters optical properties DOM. From November 2018 to July 2019, we collected 119 water samples from Erhai watershed analyzed them using UV–Vis EEM-PARAFAC study DOM in relation conditions. Our result indicated that tyrosine-like protein (C1), tryptophan-like (C2), humic-like compounds (C3) were among mostly autochthonous components percentage C3 was higher eutrophic lakes than mesotrophic light-eutrophic ultraviolet absorption coefficients at 254 nm (aCDOM(254)) fluorescence intensity 355 (Fn(355)) increased (p < 0.01) with an state. findings indicate influence nutrients environmental factors (such pH temperature) on varies development novel predictive models for assessment largely based significant correlations TSI aCDOM(254) (R2 = 0.762, p Fn(355) 0.705, 0.01). This neural network model facilitates creation fast tool highlighting connection features index. By enabling swift experimental measurements, this offers high-resolution monitoring solution tracking eutrophication plateau rivers.
Язык: Английский
Процитировано
6
Aquatic Conservation Marine and Freshwater Ecosystems, Год журнала: 2023, Номер 33(4), С. 409 - 422
Опубликована: Март 3, 2023
Abstract Humpback dolphins ( Sousa spp.), throughout their distribution ranges, are often designated as flagship species for coastal ecosystem conservation. Most of the early research on humpback was carried out in Chinese waters, and last two decades, numerous studies have provided abundant conservation‐valuable findings. In this study, a systematic review conducted to gain comprehensive understanding distributional ecology establish an updated national knowledge base about key conservation baselines species. Currently, there at least eight main areas along coast southern China, representing clear picture place‐based units. However, overall biogeographical pattern is discontinuous, existing marine protected far from sufficient protect these survival dolphins. Based photo‐identification technique, cross‐matching dolphin individuals revealed extremely low inter‐population connectivity among most known populations. Genetic suggested that several examined populations haplotype diversity levels, with limited gene flow. Morphological behavioural evidence also supports population differentiation geographical locations. These findings provide promotion management initiatives waters. All recognizable populations, together each habitat, should be considered independent With small areas, genetic unfavourable isolation, may high risk regional extinction. A country‐led scheme cross‐regional collaboration required science‐based, action‐focused timely efforts. Future aim increase or maintain habitats, connectivity, population‐level effective size.
Язык: Английский
Процитировано
9
Frontiers in Marine Science, Год журнала: 2025, Номер 12
Опубликована: Май 2, 2025
Quantifying and analyzing the temporal spatial variations of cetacean habitats is essential for establishing marine protected areas preserving natural populations. Despite its importance, studies focusing on interannual variability remain scarce. This study analyzed sighting records Sousa chinensis sea surface temperature (SST) data in eastern Pearl River Estuary (PRE) from 2009 to 2022. Initially, spatiotemporal effort their correlation with SST were examined. Subsequently, Suitability Index (SI) model was applied calculate distribution S. across different years assess changes habitat relation climate change. The findings revealed that sightings concentrated within a 227 km² area surrounding Lantau Island PRE. where occurred ranged 15.9°C 29.8°C, strong positive (r = 0.74, P <0.05) between SST. SI effectively identified patterns years, highlighting continuous decline suitable (SI ≥ 0.6) largest recorded 2012 (a neutral year), while smallest observed 2020 La Niña year). During ENSO events, exhibited northward shift average latitude. introduces novel methodologies research, supports development more effective monitoring strategies, provides valuable insights establishment areas.
Язык: Английский
Процитировано
0
Global Ecology and Conservation, Год журнала: 2025, Номер unknown, С. e03639 - e03639
Опубликована: Май 1, 2025
Язык: Английский
Процитировано
0
Frontiers in Marine Science, Год журнала: 2022, Номер 9
Опубликована: Ноя. 24, 2022
Reserve planning based on the investigation of core habitat distribution wild cetaceans is a powerful conservation strategy for protecting target species. However, studies habitats and their variations at large-scale are limited. In this study, we conducted seven years (2015-2021) boat-based field observation surveys with highly applicable generalized methods to analyze changes how these influenced largest known Indo-Pacific humpback dolphin ( Sousa chinensis ) population in Pearl River Estuary (PRE), China. Our findings revealed that there 3204 km 2 PRE, preferences related nutrients biological resources. The decreasing trend sighting rates most areas (73.2%) indicated had declined, annual decline rate (2.83%; 95% confidence interval: 0.58%-5.08%) was consistent rate. hypoxic zone low from March October 0.43% faster than non-hypoxic zone, indicating long-term sustained effects summer hypoxia population. Existing reserves have partially prevented decline. more 82.3% has not been effectively protected encounters threats pollution stress. This study offers new scientific evidence developing effective monitoring strategies populations also help establish spatial management measures reserve habitats.
Язык: Английский
Процитировано
14
Marine Mammal Science, Год журнала: 2024, Номер unknown
Опубликована: Июль 5, 2024
Abstract Indo‐Pacific humpback dolphins form a resident population off the east coast of Leizhou Peninsula (LZP) in South China. The most recent study suggested ~1,500 individuals this area, making one only two populations species exceeding 1,000 individuals. However, demographic information regarding has been lacking since 2012. Using 5‐year (2019–2023) photo‐identification data set, we examined key parameters LZP population, namely apparent survival and size, using multistate capture‐recapture analyses. Annual probabilities (φ) changed over time, fluctuating between 0.942 0.961 for adults, 0.787 0.837 juveniles. Jolly‐Seber model analyses resulted highly comparable noncalf size estimates from 2020 to 2023 ( = 479, SE 28; 2021 458, 29; 2022 481, 27; 446, 31). By reviewing available information, conclude that previously overestimated. time‐dependent survivals seemingly reflect dynamic development anthropogenic disturbance during pandemic period. We propose status should be re‐evaluated, especially postpandemic era when human activities came back “normal” levels.
Язык: Английский
Процитировано
3
Journal of Ocean University of China, Год журнала: 2024, Номер 23(4), С. 1003 - 1014
Опубликована: Июль 2, 2024
Язык: Английский
Процитировано
2
Biodiversity Science, Год журнала: 2023, Номер 31(5), С. 22670 - 22670
Опубликована: Янв. 1, 2023
Background & Aims: The Indo-Pacific humpback dolphin (Sousa chinensis) has been listed as the Grade 1 National Key Protected Animal in China.As top predator of inshore marine food chain, S. chinensis is an indicator species health status ecosystem.Due to important ecological, scientific and cultural values, it also used flagship for biodiversity conservation.Since 1990s, studies on have gradually risen, developed a new period recent years along with application 3S (RS, GPS, GIS), ecological models, molecular biological techniques.We summarized from aspects •综述•
Язык: Английский
Процитировано
5
Ecological Indicators, Год журнала: 2022, Номер 144, С. 109466 - 109466
Опубликована: Сен. 21, 2022
Coastal cetaceans are recognized as ecologically important species and have been the target for environmental monitoring programs conservation strategies. Although supervised models increasingly used to better monitor complexity relationships between their habitats, development of unsupervised learning techniques that significant advantages in visualizing, grouping reducing dimensionality data has overlooked. Here, using artificial neural network self-organizing map (SOM), we examined intraspecific variation habitat utilization among three geographically neighboring populations (waters southwest Hainan Island abbreviated WS Hainan, Sanniang Bay, Zhanjiang waters) Indo-Pacific humpback dolphin (Sousa chinensis) northern South China Sea. The results showed population inhabiting occupied a largest area with scattered patterns comparing other two Bay waters. SOM analysis further different waters distinct characteristics. S. chinensis was sighted deeper water higher salinity, whereas inhabited estuary lower pH salinity. More complicated distributed heterogeneity were observed waters, where dolphins contractively small at entrance Port dispersed another large Leizhou Bay. Correspondently, part sightings had similar those while others reported more inshore, muddied Based on these findings, hypothesized can be divided into ecotypes: estuarine non-estuarine. confirmed well identify differentiation chinensis, therefore suggested it is powerful modeling tool cetacean program. Our findings contribute specific strategy one integrated protected would several areas connecting corridors suitable Hainan.
Язык: Английский
Процитировано
8