Global change and the distributional dynamics of migratory bird populations wintering in Central America

SummaryOver half of the 332 migratory bird species that breed in North America and winter in the tropics are affected by the obstacle to migratory flight presented by the Gulf of Mexico. Landbird migration in the vicinity of the Gulf is considered from an historical perspective, and in light of netting and observational data from the western Gulf coast. A trans-Gulf crossing from the northern Gulf coast to, or over, Yucatan is the most commonly followed fall route for eastern Nearctic migrants that winter in Central America. The spring route for these species is different, involving a more westerly trans–Gulf course for some individuals, and a circum–Gulf route for others. Prevailing wind direction and the probability of meeting turbulence over the Gulf are suggested as the main selective factors affecting route form for Gulf–area migrants.

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The implications of mid‐latitude climate extremes for North American migratory bird populations

Ecosphere ◽

10.1002/ecs2.1261 ◽

2016 ◽

Vol 7 (3) ◽

Cited By ~ 13

Author(s):

Frank A. La Sorte ◽

Wesley M. Hochachka ◽

Andrew Farnsworth ◽

André A. Dhondt ◽

Daniel Sheldon

Keyword(s):

North American ◽

Climate Extremes ◽

Migratory Bird ◽

Bird Populations

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Seasonal changes in the altitudinal distribution of nocturnally migrating birds during autumn migration

Royal Society Open Science ◽

10.1098/rsos.150347 ◽

2015 ◽

Vol 2 (12) ◽

pp. 150347 ◽

Cited By ~ 17

Author(s):

Frank A. La Sorte ◽

Wesley M. Hochachka ◽

Andrew Farnsworth ◽

Daniel Sheldon ◽

Benjamin M. Van Doren ◽

...

Keyword(s):

Migratory Birds ◽

Global Climate ◽

Polar Front ◽

Migratory Bird ◽

Atmospheric Conditions ◽

Altitudinal Distribution ◽

Long Distance ◽

Bird Populations ◽

Intermediate Distance ◽

Migrating Birds

Wind plays a significant role in the flight altitudes selected by nocturnally migrating birds. At mid-latitudes in the Northern Hemisphere, atmospheric conditions are dictated by the polar-front jet stream, whose amplitude increases in the autumn. One consequence for migratory birds is that the region’s prevailing westerly winds become progressively stronger at higher migration altitudes. We expect this seasonality in wind speed to result in migrants occupying progressively lower flight altitudes, which we test using density estimates of nocturnal migrants at 100 m altitudinal intervals from 12 weather surveillance radar stations located in the northeastern USA. Contrary to our expectations, median migration altitudes deviated little across the season, and the variance was lower during the middle of the season and higher during the beginning and especially the end of the season. Early-season migrants included small- to intermediate-sized long-distance migrants in the orders Charadriiformes and Passeriformes, and late-season migrants included large-bodied and intermediate-distance migrants in the order Anseriformes. Therefore, seasonality in the composition of migratory species, and related variation in migration strategies and behaviours, resulted in a convex–concave bounded distribution of migration altitudes. Our results provide a basis for assessing the implications for migratory bird populations of changes in mid-latitude atmospheric conditions probably occurring under global climate change.

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Aplikasi Penderiaan Jauh atau Remote Sensing dalam Pemodelan Pengaruh Iklim terhadap Taburan Burung Hijrah Di Hutan Paya Laut Matang, Perak

Sains Humanika ◽

10.11113/sh.v8n3.811 ◽

2016 ◽

Vol 8 (3) ◽

Author(s):

Azimah Abd Rahman

Keyword(s):

Remote Sensing ◽

Habitat Selection ◽

Mangrove Forest ◽

Migratory Birds ◽

Climate Modeling ◽

Migratory Bird ◽

Bird Populations ◽

Alternative Habitat ◽

The Future ◽

Selection Of

Climate changes especially temperature and rainfall effect the habitat selection of bird migration in mangrove area to get some food and temporary stopover. The increase and decrease of temperature and rainfall is varies between upstream to downstream. This research was done to prove that temperature and rainfall are uneven in some area even in same boundary that can give impact in habitat selection of migratory birds. This research was concern around Matang Mangrove Forest, Perak that already familiar as focal area for migratory birds. Remote Sensing application was used in this research through use of ERDAS Imagine 8.5 which is based on pixels. This application helps to model the relationship between climate, namely temperature and rainfall with distribution density of migratory birds around the study area. Climate modeling was conducted to predict the distribution of migratory bird populations in the future due to changes in temperature and rainfall over a period of 5 years and 20 years. The results of this study showed a decrease in the population of migratory birds by 6.4% for a period of 5 years and a decrease to 7.5% for the last 20 years. Sungai Sepetang and Sungai Selinsing shown that migratory bird populations decreased continuously after 20 years. However the Sangga Besar, Teluk Kertang, Temerlok, Pulau Pasir Hitam dan Sungai Tinggi area showed an increase in the arrival of migratory birds after 20 years. This information analysis help the related agencies in manage and maintain the area around the Matang Mangrove Forest identified potential habitat for migratory birds in the future. In addition, through this study migratory bird monitoring can be carried out systematically on a wider scope without ignoring areas that strives to be the alternative habitat for migratory birds in the future.

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Seasonal associations with novel climates for North American migratory bird populations

Ecology Letters ◽

10.1111/ele.12951 ◽

2018 ◽

Vol 21 (6) ◽

pp. 845-856 ◽

Cited By ~ 8

Author(s):

Frank A. La Sorte ◽

Daniel Fink ◽

Alison Johnston

Keyword(s):

North American ◽

Migratory Bird ◽

Bird Populations

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Effects of climate variation on bird escape distances modulate community responses to global change

Scientific Reports ◽

10.1038/s41598-021-92273-1 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

M. Díaz ◽

T. Grim ◽

G. Markó ◽

F. Morelli ◽

J. D. Ibáñez-Alamo ◽

...

Keyword(s):

Global Change ◽

Food Webs ◽

Interspecific Interactions ◽

Bird Species ◽

Antipredator Behaviour ◽

Bird Populations ◽

Temperature And Precipitation ◽

Increasing Temperature ◽

Flight Initiation

AbstractClimate and land use are rapidly changing environmental conditions. Behavioral responses to such global perturbations can be used to incorporate interspecific interactions into predictive models of population responses to global change. Flight initiation distance (FID) reflects antipredator behaviour defined as the distance at which an individual takes flight when approached by a human, under standardized conditions. This behavioural trait results from a balance between disturbance, predation risk, food availability and physiological needs, and it is related to geographical range and population trends in European birds. Using 32,145 records of flight initiation distances for 229 bird species during 2006–2019 in 24 European localities, we show that FIDs decreased with increasing temperature and precipitation, as expected if foraging success decreased under warm and humid conditions. Trends were further altered by latitude, urbanisation and body mass, as expected if climate effects on FIDs were mediated by food abundance and need, differing according to position in food webs, supporting foraging models. This provides evidence for a role of behavioural responses within food webs on how bird populations and communities are affected by global change.

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Monitoring Migratory Bird Populations in Grand Teton National Park, Northern Rocky Mountains

The UW National Parks Service Research Station Annual Reports ◽

10.13001/uwnpsrc.1993.3141 ◽

1993 ◽

Vol 17 ◽

pp. 55-67

Author(s):

Martin Cody ◽

Steven Cain

Keyword(s):

National Park ◽

Migratory Bird ◽

Routine Activity ◽

Breeding Bird ◽

Grand Teton National Park ◽

Monitoring Scheme ◽

Bird Populations ◽

Jackson Hole ◽

Study Sites ◽

Land Bird

A scheme for long-term monitoring of breeding land bird populations in a wide variety of habitats representative of the northern Rockies and the Greater Yellowstone Ecosystem (GYE) was initiated in summer 1993. It is projected that the monitoring scheme, when fully established and formalized, will become a routine activity in Grand Teton National Park, where a broad range of representative vegetation types is accessible within close geographic proximity. Sixteen study sites were established within the park in pristine habitat, from the Jackson Hole lowlands to subalpine and alpine sites, from meadow, sagebrush and marshland, through willow scrub, cottonwood and aspen woodlands, to lodgepole pine and spruce-fir forests. Some of the study sites have a long history of research on the breeding birds (see below). Census sites are standardized at 5 ha in size, and mapped in detail (topography, vegetation). The locations and accessibility of the study sites permit all to be regularly and repeatedly censused during the short (6-week) breeding season. Census schedules, timing, and methodological protocols are being established and refined, to provide for strictly controlled inter-site and inter-year comparisons in breeding bird populations, species composition, and densities. In view of the projected benefits to science and resource management of this monitoring scheme, the project hopefully will be continued and the data base further expanded in future years, with a larger range of study sites (24-36).

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