scholarly journals Mud-puddling on roadsides: a potential ecological trap for butterflies

2022 ◽  
Author(s):  
Letizia Campioni ◽  
Ilaria Marengo ◽  
Jacinto Román ◽  
Marcello D’Amico
Keyword(s):  
Ecological Trap

Habitat‐dependent prey availability and offspring provisioning explain an ecological trap in a migratory bird

2013 ◽  
Vol 27 (3) ◽  
pp. 702-709 ◽  
Author(s):  
Franck A. Hollander ◽  
Nicolas Titeux ◽  
Hans Dyck
Keyword(s):  
Prey Availability ◽  
Migratory Bird ◽  
Ecological Trap

scholarly journals Casitas: a location-dependent ecological trap for juvenile Caribbean spiny lobsters, Panulirus argus

2015 ◽  
Vol 72 (suppl_1) ◽  
pp. i177-i184 ◽  
Author(s):  
Benjamin C. Gutzler ◽  
Mark J. Butler ◽  
Donald C. Behringer
Keyword(s):  
Florida Keys ◽  
Nutritional Condition ◽  
Ecological Trap ◽  
Habitat Modification ◽  
Panulirus Argus ◽  
Risk Of Predation ◽  
Spiny Lobsters ◽  
Nursery Habitats ◽  
Animal Size ◽  
Fisheries Enhancement

Abstract Casitas are artificial shelters used by fishers to aggregate Caribbean spiny lobsters (Panulirus argus) for ease of capture. However, casitas may function as an ecological trap for juvenile lobsters if they are attracted to casitas and their growth or mortality is poorer compared with natural shelters. We hypothesized that juvenile lobsters may be at particular risk if attracted to casitas because they are less able than larger individuals to defend themselves, and do not forage far from shelter. We compared the nutritional condition, relative mortality, and activity of lobsters of various sizes in casitas and natural shelters in adult and juvenile lobster-dominated habitats in the Florida Keys (United States). We found that the ecological effects of casitas are complex and location-dependent. Lobsters collected from casitas and natural shelters did not differ in nutritional condition. However, juvenile lobsters in casitas experienced higher rates of mortality than did individuals in natural shelters; the mortality of large lobsters did not differ between casitas and natural shelters. Thus, casitas only function as ecological traps when deployed in nursery habitats where juvenile lobsters are lured by conspecifics to casitas where their risk of predation is higher. These results highlight the importance of accounting for animal size and location-dependent effects when considering the consequences of habitat modification for fisheries enhancement.

Riparian habitat disturbed by reservoir management does not function as an ecological trap for the Yellow Warbler (Setophaga petechia)

2012 ◽  
Vol 90 (3) ◽  
pp. 320-328 ◽  
Author(s):  
S.P. Quinlan ◽  
D.J. Green
Keyword(s):  
Habitat Selection ◽  
Habitat Preferences ◽  
Canopy Cover ◽  
Ecological Trap ◽  
Riparian Habitat ◽  
Yellow Warbler ◽  
Nest Sites ◽  
Selection Decisions ◽  
Yellow Warblers ◽  
Setophaga Petechia

Ecological traps arise when anthropogenic change creates habitat that appears suitable but when selected reduces the fitness of an individual. We evaluated whether riparian habitat within the drawdown zone of the Arrow Lakes Reservoir, British Columbia, creates an ecological trap for Yellow Warblers ( Setophaga petechia (L., 1766)) by investigating habitat preferences and the fitness consequences of habitat selection decisions. Preferences were inferred by examining how habitat variables influenced settlement order, and comparing habitat at nest sites and random locations. Males preferred to settle in territories with more riparian shrub and tree cover, higher shrub diversity, and less high canopy cover. Females built nests in taller shrubs surrounded by a greater density of shrub stems. Habitat preferences were positively associated with fitness: nest sites in taller shrubs surrounded by higher shrub-stem densities were more likely to avoid predation and fledge young, whereas territories with more riparian cover, higher shrub diversity, and less high canopy cover had higher annual productivity. We therefore found no evidence that riparian habitat affected by reservoir operations functions as an ecological trap. Current habitat selection decisions may be associated with fitness because Yellow Warblers are adapted to breeding in a heterogeneous environment subject to periodic flooding.

scholarly journals The Occurence of Ecological Traps in Bird Populations: Is our Knowledge Sufficient? A Review

2012 ◽  
Vol 5 (3) ◽  
pp. 36-56 ◽  
Author(s):  
Petr Suvorov ◽  
Jana Svobodová
Keyword(s):  
Exotic Species ◽  
Species Conservation ◽  
Habitat Type ◽  
Bird Species ◽  
Ecological Trap ◽  
Native Communities ◽  
Bird Populations ◽  
Suburban Areas ◽  
Arable Fields ◽  
Insufficient Time

ABSTRACT Anthropogenic changes in a landscape create new cues for birds, which must permanently adapt to these. If landscape changes occur too quickly, individuals have insufficient time to develop adequate reactions. They may, therefore, preferentially nest in low-quality habitats, which can lead to diminished nesting success and to reduction of their population size. This is usually termed the ecological trap hypothesis. We reviewed 38 studies investigating this phenomenon and analysed whether relationships exist between ecological trap occurrence and geographical region, habitat type, and/or life strategies of bird species. Ecological traps were most often associated with the presence of exotic species. Exotic species can modify environmental conditions in ways to which native communities are not adapted. They have been mainly detected in open habitats. Such open habitats as arable fields and meadows are under greater human pressure, and rapid changes probably occur there more frequently. Although more studies from North America were investigated, the hypothesis was supported more frequently in European studies. This is possibly due to higher human population density and, hence, more frequent habitat changes. Our results show that an ecological trap is not likely associated with migration. Ground nests suffered fewer consequences of such traps than did other nest types. Although the implications of the ecological trap hypothesis in species conservation are undisputable, a more detailed approach is still needed. For instance, some habitat types, such as suburban areas, have been neglected in the context of ecological traps, as has been the phenomenon’s appearance in pristine habitats.

scholarly journals Urban Sprawl, Food Subsidies and Power Lines: An Ecological Trap for Large Frugivorous Bats in Sri Lanka?

Diversity ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 94 ◽  
Author(s):  
José L. Tella ◽  
Dailos Hernández-Brito ◽  
Guillermo Blanco ◽  
Fernando Hiraldo
Keyword(s):  
Sri Lanka ◽  
Anthropogenic Impacts ◽  
Population Decline ◽  
Ecological Trap ◽  
Power Lines ◽  
Foraging Habitat ◽  
Urban Habitats ◽  
Flying Foxes ◽  
Food Subsidies ◽  
Urbanized Areas

Electrocution is one of the less known anthropogenic impacts likely affecting the bat population. We surveyed 925 km of overhead distribution power lines that supply energy to spreading urbanized areas in Sri Lanka, recording 300 electrocuted Indian flying foxes (Pteropus giganteus). Electrocutions were recorded up to 58 km from the nearest known colony, and all of them were in urbanized areas and very close ( X ¯ = 4.8 m) to the exotic fruiting trees cultivated in gardens. Predictable anthropogenic food subsidies, in the form of cultivated fruits and flowers, seem to attract flying foxes to urban habitats, which in turn become ecological traps given their high electrocution risk. However, electrocution rates greatly varied among the 352 power lines surveyed (0.00–24.6 indiv./km), being highest in power lines with four wires oriented vertically ( X ¯ = 0.92 indiv./km) and almost zero in power lines with wires oriented horizontally. Therefore, the latter design should be applied to projected new power lines and old vertically oriented lines in electrocution hotspots should be substituted. Given that flying foxes are key seed dispersers and pollinators, their foraging habitat selection change toward urban habitats together with high electrocution risk not only may contribute to their population decline but also put their ecosystem services at risk.

When Good Fish Make Bad Decisions: Coho Salmon in an Ecological Trap

2012 ◽  
Vol 32 (1) ◽  
pp. 87-92 ◽  
Author(s):  
Carson Jeffres ◽  
Peter Moyle
Keyword(s):  
Coho Salmon ◽  
Ecological Trap

Ecological Trap for Desert Lizards Caused by Anthropogenic Changes in Habitat Structure that Favor Predator Activity

2010 ◽  
Vol 24 (3) ◽  
pp. 803-809 ◽  
Author(s):  
DROR HAWLENA ◽  
DAVID SALTZ ◽  
ZVIKA ABRAMSKY ◽  
AMOS BOUSKILA
Keyword(s):  
Habitat Structure ◽  
Ecological Trap ◽  
Anthropogenic Changes

Municipal wastewater as an ecological trap: Effects on fish communities across seasons

2021 ◽  
Vol 759 ◽  
pp. 143430
Author(s):  
Hossein Mehdi ◽  
Samantha C. Lau ◽  
Caitlyn Synyshyn ◽  
Matthew G. Salena ◽  
Erin S. McCallum ◽  
...  
Keyword(s):  
Municipal Wastewater ◽  
Fish Communities ◽  
Ecological Trap

scholarly journals The Botteri's Sparrow and Exotic Arizona Grasslands: An Ecological Trap or Habitat Regained?

The Condor ◽  
2005 ◽  
Vol 107 (4) ◽  
pp. 731-741 ◽  
Author(s):  
Zach F. Jones ◽  
Carl E. Bock
Keyword(s):  
Site Fidelity ◽  
Livestock Grazing ◽  
Breeding Habitat ◽  
Ecological Trap ◽  
Home Ranges ◽  
Late 19Th Century ◽  
Nest Sites ◽  
Native Grasslands ◽  
Per Capita ◽  
Sporobolus Wrightii

Abstract The Botteri's Sparrow (Aimophila botterii) is a bird of tall grasslands that temporarily disappeared from Arizona following heavy livestock grazing in the 1890s. Its return was noted first in sacaton (Sporobolus wrightii), an uncommon native floodplain tallgrass often >2 m in height, and subsequently in stands of exotic lovegrasses (Eragrostis spp.) spreading into adjacent uplands that otherwise supported shorter native grasslands. We examined whether the exotic grasslands provided suitable breeding habitat for Botteri's Sparrows, compared to native grasslands. We counted birds for three years on 18 plots, monitored 314 nests on 323 home ranges, banded 583 birds, and measured vegetation on plots and home ranges, and at nests and fledgling locations. Abundance and site fidelity were positively associated with grass height and cover, being greatest in sacaton, intermediate in exotics, and lowest in native upland grasslands. The three habitats did not differ in young fledged per capita. Vegetation cover on Botteri's Sparrow home ranges did not differ from the surrounding available habitat, but locations of flightless recently fledged young included taller and more dense vegetation than either nest sites or random locations, especially in sparsely vegetated native grasslands. These results suggest that fledglings required substantial cover to avoid predation while they completed development. Far from being an ecological trap, the exotic lovegrasses apparently are providing essential cover for the Botteri's Sparrow in Arizona, perhaps allowing it to regain an abundance similar to what existed regionally prior to overgrazing of the late 19th Century.

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