منابع مشابه
Negative Interspecies Interactions in a Glaucous-winged Gull Colony on Protection Island, Washington
Protection Island, Washington, is one of the most important nesting sites for Glaucous-winged Gulls (Larus glaucescens) in the Puget Sound area. Changes in the numbers and distribution of nests in a Glaucous-winged Gull colony on Violet Point, Protection Island, were tracked from 1980 to 2010. The colony grew steadily until the early 1990s, then declined to about half its former level. The main...
متن کاملDenitrification in Marsh-Pond-Marsh Constructed Wetlands Treating Swine Wastewater at Different Loading Rates
Denitrification in constructed wetlands can be very important in the treatment of swine lagoon effluent when land application areas are limited. The objectives of this investigation were to determine (i) the denitrification enzymeactivity (DEA) in themarsh sediments ofmarshpond-marsh (MPM) constructed wetlands, (ii) changes in DEA with additions of carbon and nitrate, and (iii) the response of ...
متن کاملMangrove expansion and salt marsh decline at mangrove poleward limits.
Mangroves are species of halophytic intertidal trees and shrubs derived from tropical genera and are likely delimited in latitudinal range by varying sensitivity to cold. There is now sufficient evidence that mangrove species have proliferated at or near their poleward limits on at least five continents over the past half century, at the expense of salt marsh. Avicennia is the most cold-toleran...
متن کاملIMULATING THE EFFECTS OF PREDATION AND EGG-HARVEST AT A GULL COLONY Final Report to: Glacier Bay National Park Gustavus, Alaska
We developed an individual-based simulation model to explore the effects of harvesting eggs from a glaucous-winged gull (Larus glaucescens) colony that also experiences egg loss from avian predators. The model has direct application to Glacier Bay National Park, where resource managers are concerned about potential negative effects of traditional Native Alaskan harvesting of gull eggs at coloni...
متن کاملThermal Stress and Predation: Influences on the Structure of a Gull Colony and Possibly on Breeding Distributions
-The arrangement of nesting territories of Larus occidentalis livens on beaches is commonly linear, and most territories are adjacent to water. This arrangement differs from clustered colonies typical of most gulls. Two hypotheses are advanced to explain this unusual nest arrangement: it may provide access to the intertidal zone for foraging or access to water for thermoregulation. Foraging act...
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ژورنال
عنوان ژورنال: Blue Jay
سال: 1951
ISSN: 2562-5667,0006-5099
DOI: 10.29173/bluejay1042