Effects of aquaculture on the maintenance of waterbird populations

Conservation Biology, Journal Year: 2022, Volume and Issue: 36(5)

Published: March 26, 2022

Abstract The global aquaculture industry has expanded rapidly and is increasingly important for maintaining food security providing habitat many waterbirds. Clarifying how waterbirds use aquafarms aquafarm affects waterbird population maintenance can help improve management of the landscape such that it provide We investigated by in China, world's largest producer products. used data from literature on expert knowledge (questionnaire survey) China Bayesian phylogenetic generalized linear mixed models to analyze relationship between degree trends Sixty‐nine percent species have been recorded at aquafarms. Approximately one quarter all about same proportion threatened were found forage aquafarms, consuming either cultured aquatic products or other stuffs. In general, with a high unlikely exhibit decline over past 2 decades, when rapid loss natural occurred China. This was not detected species, despite there being no significant difference nonthreatened species. Our results suggest large expanding populations However, are replacement habitats because benefited less use. Given often negatively affect wetlands, which compensate probably depends quality requirements recommend an integrated ecological economic analysis formulate policies conserve wildlife within constraints opportunities associated human livelihoods.

Language: Английский

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Study on suitability assessment of waterbird habitats along the Bohai Rim

Ecological Indicators, Journal Year: 2023, Volume and Issue: 150, P. 110229 - 110229

Published: April 15, 2023

In recent years, due to rapid economic development, the Bohai Rim has become a focus of attention. The area abundant waterbird resources, however, coastal wetlands in are currently under serious threat and conservation needs be addressed urgently. Exploring changes main driving factors waterbirds conducting habitat suitability assessments for great significance regional ecology environmental protection efforts. this study, during period 2002–2021, we recorded numbers species region China. Then, quantified potential suitable habitats analyzed using MaxEnt model. results showed that richness around increased gradually over 20-year period, more were detected wetland than other habitats. Five hotspot regions require special attention, including Yellow River Delta Nature Reserve, Beidagang Wetland, Beidaihe National Wetland Park, Liaohe Estuary Caofeidian Park. NDVI, land cover maximum temperature warmest month. This study provides reference theoretical support rational use.

Language: Английский

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Achievements, challenges, and recommendations for waterbird conservation in China's coastal wetlands

Avian Research, Journal Year: 2023, Volume and Issue: 14, P. 100123 - 100123

Published: Jan. 1, 2023

China's coastal wetlands provide breeding, migration stopover, and wintering habitats for about 230 waterbird species, which is more than a quarter of all waterbirds in the world. Large-scale high intensity human activities have resulted serious loss degradation over past half century, causing population declines many waterbirds. Through literature review expert surveys, this article reviews conservation measures taken recent decades to conserve provides recommendations future action from three aspects: policy administration, habitat management, multiparty participation. Over decades, legislation, regulations plans at national level site-specific interventions been implemented, with notable improvement effectiveness making multi-stakeholder Accordingly, some threats mitigated key sites designated as strictly protected nature reserves. However, critical issues still remain, mostly related such wetland restoration, control invasive Spartina alterniflora, environmental pollution, artificial quality. We highlight that protecting natural tidal improving quality are waterbirds, especially those highly dependent on intertidal wetlands. China has demonstrated strong commitment ecological restoration future, terms both funding policies biodiversity ecosystems. It important supported continuously by science- evidence-based decisions actions.

Language: Английский

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Bird diversity and waterbird habitat preferences in relation to wetland restoration at Dianchi Lake, south-west China

Avian Research, Journal Year: 2019, Volume and Issue: 10(1)

Published: June 6, 2019

Restoration projects have been implemented worldwide to mitigate the adverse effects of loss and degradation wetland habitats. Much research has carried out on impacts birds restoration management in China. Studies mainly investigated central or coastal wetlands, while inland wetlands remote areas much less studied. We focused examining response wild Dianchi Lake, south-west The line transect method was performed at 26 sampling plots. Three these were city, acquire all bird data 23 plots located every 2–8 km along shore between December 2011 November 2013. collected related records by searching available literature, articles, newspapers birdwatchers compare species variation before after implementation restoration. To measure relationships waterbird assemblages habitat structures, we used canonical correspondence analysis (CCA) pair main matrix with a second variables. recorded 182 belonging 51 families 17 orders. Of species, 42 new for Kunming City 20 Yunnan Province. Ten found disappeared from Lake. CCA results indicated that waterbirds could be divided into four categories based their preference: synanthropic (wintering gulls), special (shorebirds), semi-natural coots ducks) disturbance-tolerant (resident) species. Our study is first consider entire community throughout year discuss launched Distinct requirements different groups detected our study, suggesting types should implemented.

Language: Английский

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Effects of anthropogenic landscapes on population maintenance of waterbirds

Conservation Biology, Journal Year: 2021, Volume and Issue: 36(2)

Published: July 27, 2021

Abstract Anthropogenic impacts have reduced natural areas but increased the area of anthropogenic landscapes. There is debate about whether landscapes (e.g., farmlands, orchards, and fish ponds) provide alternatives to habitat under what circumstances. We considered can mitigate population declines for waterbirds. collected data on trends biological traits 1203 populations 579 species across planet. Using Bayesian generalized linear mixed models, we tested ability a use an landscape predict waterbird globally conservation concern. benefited maintenance common not less‐common species. Conversely, was associated with threatened Our findings delineate some limitations declines, suggesting that global depends protecting remaining improving quality in Article impact statement : Protecting as are both needed achieve effective conservation.

Language: Английский

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China's Ecological Conservation Redline policy is a new opportunity to meet post‐2020 protected area targets

Conservation Letters, Journal Year: 2021, Volume and Issue: 15(2)

Published: Dec. 10, 2021

Abstract Designating protected and conserved areas is a critical component of biodiversity conservation. The 10th Convention on Biological Diversity (CBD) in 2010 set global targets for the areal extent (PAs) that were met partially 2020, yet new, more ambitious target needed to halt ongoing loss. China recently introduced national Ecological Conservation Redline policy, which aims ensure no net change land cover loss or degradation ecosystem services within are maintaining ecological safety functions. Enacting this policy could achieve ancillary conservation outcomes even where not primary objective, thus meeting CBD's definition “other effective area‐based measures” (OECM). By comparing boundaries with important coastal waterbird sites China, we found three times be under new redline compared nature reserve system alone. This indicates considering approach as form OECM promising pathway expand coverage PAs conserve outside currently designated PAs, providing model adopted around world.

Language: Английский

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The future distribution of wetland birds breeding in Europe validated against observed changes in distribution

Environmental Research Letters, Journal Year: 2022, Volume and Issue: 17(2), P. 024025 - 024025

Published: Jan. 25, 2022

Abstract Wetland bird species have been declining in population size worldwide as climate warming and land-use change affect their suitable habitats. We used distribution models (SDMs) to predict changes range dynamics for 64 non-passerine wetland birds breeding Europe, including size, position of centroid, margins. fitted the SDMs with data collected first European Breeding Bird Atlas distributional over a century (the 1970s–2070s). The predicted annual were then compared observed centroid time period 30 years using from second Atlas. Our successfully ca. 75% contract future, while remaining (mostly southerly species) expand ranges northward. northern margins southern northerly species, both, shift Predicted shifts centroids broadly positively associated changes, although some deviated markedly predictions. average core distributions was 5 km yr −1 towards north (5% northeast, 45% north, 40% northwest), slower 3.9 . generally larger than which suggests that may lag behind environmental leading ‘climate debt’. suggest predictions should be viewed qualitative rather quantitative outcomes, indicating care taken concerning single species. Still, our results highlight urgent need management actions such creation restoration improve birds’ resilience expected future.

Language: Английский

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Assessment of Blue Carbon Storage Loss in Coastal Wetlands under Rapid Reclamation

Sustainability, Journal Year: 2018, Volume and Issue: 10(8), P. 2818 - 2818

Published: Aug. 9, 2018

Highly productive coastal wetlands play an essential role in storing blue carbon as one of their ecosystem services, but they are increasingly jeopardized by intensive reclamation activities to facilitate rapid population growth and urbanization. Coastal causes the destruction severe degradation wetland ecosystems, which may affect abilities store carbon. To assist with international accords on carbon, we evaluated dynamics storage under China. By integrating density data collected from field measurement experiments literature, InVEST model, Carbon Storage Sequestration was used estimate across area between 1990 2015. The result is first map capable informing about areas a national scale. We found that more than 380,000 hectares were affected reclamation, resulted release ca. 20.7 Tg loss natural artificial accounted for 72.5% total loss, highlights major task managing sustainability. In addition, top 20% covered 4.2% area, can be applied critical information redline planning. conclude due conversion exceeded emission energy consumption within area. Implementing Redline policy could guide management resulting greater resiliency regarding sustained services.

Language: Английский

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Mapping intertidal topographic changes in a highly turbid estuary using dense Sentinel-2 time series with deep learning

ISPRS Journal of Photogrammetry and Remote Sensing, Journal Year: 2023, Volume and Issue: 205, P. 1 - 16

Published: Oct. 1, 2023

Intertidal mudflats are an important component of the coastal geomorphological system at interface between ocean and land. Accurate up-to-date mapping intertidal topography high spatial resolution, tracking its changes over time, essential for habitat protection, sustainable management vulnerability analysis. Compared with ground-based or airborne terrain mapping, satellite-based waterline method is more cost-effective constructing large-scale topography. However, accuracy affected by extraction waterlines calibration height. The blurred boundary turbid water in tide-dominated estuary brings enormous challenges accurate extraction, errors estuarine level simulations prevent direct heights. To address these issues, this paper developed a novel deep learning using parallel self-attention mechanism boundary-focused hybrid loss to extract accurately from dense Sentinel-2 time series. UAV photogrammetric surveys were employed calibrate heights rather than simulated levels, such that error propagation constrained effectively. Annual topographic maps Yangtze China generated 2020 2022 optimized method. Experimental results demonstrate proposed could achieve excellent performance land segmentation time-varying tidal environments, better generalization capability compared benchmark U-Net, U-Net++ U-Net+++ models. comparison observations resulted RMSE 13 cm, indicating effectiveness monitoring morphological mudflats. successfully identified hotspots mudflat erosion deposition. Specifically, connected predominantly experienced deposition 10–20 cm two-year period, whereas offshore sandbars exhibited instability significant 20–60 during same period. These serve as valuable datasets providing scientific baseline information support decisions.

Language: Английский

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The effect of Spartina alterniflora eradication on waterbirds and benthic organisms

Restoration Ecology, Journal Year: 2023, Volume and Issue: 31(8)

Published: Oct. 10, 2023

There has been an increasing number of coastal restoration projects to eradicate Smooth cordgrass ( Spartina alterniflora ) and restore bare tidal flats conserve waterbirds. However, the evidence for assumed benefits waterbirds benthic organisms after such efforts remains limited. We evaluated impact S. eradication on in southern China. deployed time‐lapse cameras satellite trackers quantify compare occurrence frequency habitat use birds different habitats. compared density biomass collected areas where had eradicated. found that almost all waterbirds, except gulls, avoided was present. Once eradicated, species richness species‐level diversity shorebirds did not differ significantly from those flats. At least 9 out 14 tracked individual used with Common Redshank Tringa totanus demonstrating a clear preference habitat. The benthos deeper sediments (5–20 cm below surface) were lower eradicated than flats, indicating food resources may take longer 1 year recover. This research demonstrates is important waterbird habitats, should be made are

Language: Английский

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