Understanding the ecological and evolutionary function of stopover in migrating birds

Biological reviews/Biological reviews of the Cambridge Philosophical Society, Journal Year: 2022, Volume and Issue: 97(4), P. 1231 - 1252

Published: Feb. 8, 2022

ABSTRACT Global movement patterns of migratory birds illustrate their fascinating physical and physiological abilities to cross continents oceans. During voyages, most land multiple times make so‐called ‘stopovers’. Our current knowledge on the functions stopover is mainly based proximate study departure decisions. However, such studies are insufficient gauge fully ecological evolutionary stopover. If we how a focal trait, e.g. changes in energy stores, affects decision depart from without considering trait(s) that actually caused bird land, unfavourable environmental conditions for flight, misinterpret function It thus important realise acknowledge stopovers have many different functions, not every migrant has same (set of) reasons stop‐over. Additionally, may obtain contradictory results because significance traits context dependent. For instance, late spring migrants be more prone risk‐taking with lower stores than early migrants. Thus, neglect decisions subject selection minimise immediate (mortality risk) and/or delayed (low future reproductive output) fitness costs. To alleviate these issues, first define as an interruption endurance flight costs . Second, review all probable stopover, which include accumulating energy, various forms recovery avoiding adverse list potential other less well studied, minimising predation, exhaustion spatiotemporal adjustments migration. Third, derived aspects, argue paradigm shift ecology research. This includes focusing why individual interrupts its likely identify individual‐specific function(s) correctly departure‐decision studies. Moreover, highlight selective forces acting dependent expected differ between, K −/ r ‐selected species, sexes migration strategies. example, else being equal, species survival rate, high rate) should stronger urge continue or resume increase suffered offset by higher success subsequent breeding season. Finally, propose focus mechanisms controlling landing decisions, ultimate shaping ideas limited but can applied any species. revised definition proposed stimulate fruitful discussion towards better understanding Furthermore, identifying will support targeted measures conserve restore functionality sites threatened anthropogenic changes. especially long‐distance migrants, currently alarming decline.

Language: Английский

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Accelerating declines of North America’s shorebirds signal the need for urgent conservation action

Ornithological Applications, Journal Year: 2023, Volume and Issue: 125(2)

Published: Feb. 8, 2023

Abstract Shorebirds are declining to a greater extent than many other avian taxa around the world. In North America, shorebirds, along with aerial insectivores and grassland birds, have some of highest proportions species any group. Here, we apply new hierarchical Bayesian model analyze shorebird migration monitoring data from across 1980 2019, present most recent available estimates trends for 28 species. Point survey-wide in abundance were negative 26 (93%). Despite challenges low precision associated count data, 19 had 95% credible intervals that entirely negative. More half estimated lost >50% their abundance. Furthermore, rates decline accelerated during last three generations trend more 18 (64%) three-generation period comparison previous period. Many now exceed international criteria threatened listing. The analytic approach used here allows us regional variation trends, although survey coverage strength inference greatest eastern portions America (east 100°W). We found declines at staging sites Atlantic Coast Carolina Nova Scotia, lesser Gulf midcontinental United States. populations reported worrisome signal urgent need conservation action. addition, it would be beneficial validate these results through collection analysis complementary initiate demographic studies throughout annual cycle determine where when likely originate. This improved information will allow development targeted efforts reverse

Language: Английский

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Ecological restoration of coastal wetlands in China: Current status and suggestions

Biological Conservation, Journal Year: 2024, Volume and Issue: 291, P. 110513 - 110513

Published: Feb. 29, 2024

Language: Английский

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Global pattern of nest predation is disrupted by climate change in shorebirds

Science, Journal Year: 2018, Volume and Issue: 362(6415), P. 680 - 683

Published: Nov. 8, 2018

No longer a safe haven Many biological patterns have latitudinal component. One long-recognized pattern is that predation rates are higher at lower latitudes. This may explain why many migratory birds travel thousands of miles from the tropics to poles breed. Looking across records, Kubelka et al. found climate change seems altered this fundamental pattern. In shorebirds, least, on nests now in Arctic than tropics. Science , issue p. 680

Language: Английский

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Fuelling conditions at staging sites can mitigate Arctic warming effects in a migratory bird

Nature Communications, Journal Year: 2018, Volume and Issue: 9(1)

Published: Oct. 9, 2018

Abstract Under climate warming, migratory birds should align reproduction dates with advancing plant and arthropod phenology. To arrive on the breeding grounds earlier, migrants may speed up spring migration by curtailing time spent en route , possibly at cost of decreased survival rates. Based a decades-long series observations along an entire flyway, we show that when refuelling is limited, variation in food abundance staging area affects fitness. Bar-tailed godwits migrating from West Africa to Siberian Arctic reduce their European site thus maintain close match between tundra Annual probability decreases shorter times, but correlates positively rate, which turn correlated area. This chain effects implies conditions temperate zone determine ability cope climate-related changes Arctic.

Language: Английский

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Mapping coastal salt marshes in China using time series of Sentinel-1 SAR

ISPRS Journal of Photogrammetry and Remote Sensing, Journal Year: 2021, Volume and Issue: 173, P. 122 - 134

Published: Jan. 19, 2021

Language: Английский

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Population trends, threats, and conservation recommendations for waterbirds in China

Avian Research, Journal Year: 2018, Volume and Issue: 9(1)

Published: April 19, 2018

China is one of the countries with abundant waterbird diversity. Over past decades, China's waterbirds have suffered increasing threats from direct and indirect human activities. It important to clarify population trends as well put forward conservation recommendations. We collected data a total 260 species in Wetlands International database. calculated number increasing, declining, stable, unknown trends. threatened levels Red List Vertebrates (2016), which was compiled according IUCN criteria species. Based on literature review, we refined major China. Of China, 84 (32.3%) exhibited 35 (13.5%) kept 16 (6.2%) showed Population were for 125 (48.1%). There no significant difference between migratory (32.4% decline) resident (31.8% or among distributed exclusively along coasts (28.6% decline), inland (36.6% both (32.5% decline). A 38 (15.1% total) listed 27 (10.8% Near Threatened Habitat loss threat waterbirds, 32 (84.2%) being affected. In addition, 73.7% (28 species), 71.1% (27 57.9% (22 species) affected by disturbance, environmental pollution, illegal hunting, respectively. propose recommendations conservation, including (1) strengthening nature wetlands restoration degraded wetlands, (2) enhancing public awareness (3) improving enforcement Wildlife Protection Law cracking down (4) carrying out long-term surveys dynamics, (5) restoring populations highly-threatened through artificial intervention, (6) promoting international regional exchanges cooperation share information their conservation.

Language: Английский

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Habitat environments impacted the gut microbiome of long-distance migratory swan geese but central species conserved

Scientific Reports, Journal Year: 2018, Volume and Issue: 8(1)

Published: Aug. 31, 2018

The gut microbime plays an important role in the health of wild animals. This microbial community could be altered by habitat pollution and other human activities that threaten host organisms. Here, we satellite-tracked a flock swan geese (Anser cygnoides) migrating from their breeding area (Khukh Lake, Mongolia), with low levels activity, to wintering (Poyang China) which has been heavily impacted activities. Twenty fecal samples were collected each site. High-throughput sequencing 16S ITS was employed explore bacterial fungal composition diversity microbiome. Although general composition, alpha-diversity, functional prediction, central taxa phylogenetic networks showed some similarities between two habitats, significant divergences detected terms beta-diversity, species abundances, interaction network topologies. In addition, disease-related xenobiotic biodegradation pathways, pathogenic bacteria significantly increased communities at Poyang Lake. Our results reveal microbiome geese, while somewhat after long-distance migration, still maintained core group species. We also show environmental stress impact these communities, suggesting indirectly animals altering

Language: Английский

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Changes in area and number of nature reserves in China

Conservation Biology, Journal Year: 2019, Volume and Issue: 33(5), P. 1066 - 1075

Published: Jan. 24, 2019

Nature reserves (NR) are the cornerstone of biodiversity conservation. Over past 60 years, rapid expansion NRs in China, one world's megadiverse countries, has played a critical role slowing loss. We examined changes number and area China's from 1956 to 2014 analyzed effect economic development on 2005 with linear models. Despite continuing increase NRs, total decreased by 3% 2007 2014. This loss resulted downsizing degazettement existing slowdown establishment new ones. regions exhibited greater decrease area, suggesting that closely related intensifying competition between growth For example, boundary adjustments national most strictly protected along coast Yellow Sea, global hotspot fast-growing economy, one-third area. One important ecosystems these tidal wetlands, 27.8% because 25.2% land reclamation. Our results suggest conservation achievement, terms both quality, declining at least some Chinese NR estate. Although designation areas primarily managed for sustainable use increased rapidly recent years we propose as their main function should not be replaced or weakened.Cambios en la Superficie y el Número de Reservas Naturales China Resumen Las reservas naturales (RN) son piedra angular conservación biodiversidad. Durante los últimos años, rápida expansión las RN uno países megadiversos, ha jugado un papel crítico reducción pérdida Examinamos cambios número superficie analizamos efecto del desarrollo económico mediante modelos lineales. A pesar incremento continuo RN, decreció Esta resultó cambio registro existentes una desaceleración establecimiento nuevas. regiones con rápido presentaron mayor disminución superficie, lo que sugiere están relacionados cercanamente intensificación competencia entre crecimiento conservación. Por ejemplo, ajustes límites nacionales, más estrictamente protegidas, largo costa Mar Amarillo, sitio importancia para biodiversidad economía crecimiento, tercio total. Uno ecosistemas importantes estas humedales mareales, debido reclamación tierras. Nuestros resultados sugieren logros conservación, términos tanto área como calidad, declinando China. Aunque designación áreas protegidas administradas primariamente uso sustentable incrementado rápidamente años recientes proponemos cuya principal función es no deben ser reemplazadas o debilitadas.自然保护区是生物多样性保护的基石。在过去的 年间, 作为全球生物多样性最丰富国家之一的中国, 自然保护区发展迅速, 为减缓全球生物多样性丧失发挥了关键作用。本文分析了 1956-2014 年间中国自然保护区数量和面积的变化, 并用线性模型分析了经济发展对 2005-2014 年间自然保护区发展的影响。尽管中国的自然保护区从建立之初数量一直在增加, 但总面积在 2007-2014 年间减少了 3%。这一减少是由于一些自然保护区面积缩小或被撤销而新建自然保护区的增速放缓所造成的。经济增长较快地区的自然保护区面积减少幅度较大, 这说明自然保护区的缩小或被撤销与经济发展和自然保护之间的冲突加剧密切相关。例如, 在中国黄海海岸这一全球生物多样性热点和经济快速增长的区域, 国家级自然保护区 (受最严格保护的自然保护区) 由于边界调整导致总面积减少了三分之一; 受边界调整和滩涂围垦的影响, 自然保护区内的滩涂湿地(具有重要保护价值的生态系统类型)面积分别减少了 和 25.2%。本研究结果表明, 无论从面积还是从质量方面衡量, 中国自然保护区的保护功能至少在局部地区可能有所下降。近年来, 偏重于资源可持续利用功能的保护地在中国发展迅速, 但这不能取代或削弱以生物多样性保护为主要功能的自然保护区。.

Language: Английский

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Loss of functional connectivity in migration networks induces population decline in migratory birds

Ecological Applications, Journal Year: 2019, Volume and Issue: 29(7)

Published: June 25, 2019

Migratory birds rely on a habitat network along their migration routes by temporarily occupying stopover sites between breeding and non-breeding grounds. Removal or degradation of in might impede movement thereby reduce success survival. The extent to which the breakdown networks, due changes land use, impacts population sizes migratory is poorly understood. We measured functional connectivity networks waterfowl species that migrate over East Asian-Australasian Flyway from 1992 2015. analysed relationship connectivity, while taking into account other commonly considered traits, using phylogenetic linear mixed model. found significantly declined with reduction networks; no variables were important. conclude current decrease loss can negatively crucially impact birds. Our findings provide new insights underlying mechanisms affect trends under environmental changes. Establishment international agreements leading creation systematic conservation associated species' distributions may safeguard bird populations.

Language: Английский

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