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|a (DE-627)JST139235604
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|a (JST)26164931
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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1 |
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|a Natusch, Daniel James Deans
|e verfasserin
|4 aut
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|a Biotic interactions mediate the influence of bird colonies on vegetation and soil chemistry at aggregation sites
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|c 2017
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|a Text
|b txt
|2 rdacontent
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|a Computermedien
|b c
|2 rdamedia
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|a Online-Ressource
|b cr
|2 rdacarrier
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|a Colonial-nesting organisms can strongly alter the chemical and biotic conditions around their aggregation sites, with cascading impacts on other components of the ecosystem. In tropical Australia, Metallic Starlings (Aplonis metallica) nest in large colonies far above the forest canopy, in emergent trees. The ground beneath those trees is open, in stark contrast to the dense foliage all around. We surveyed the areas beneath 27 colony trees (and nearby randomly chosen trees lacking bird colonies) to quantify the birds' impacts on soil and vegetation characteristics, and to test alternative hypotheses about the proximate mechanisms responsible for the lack of live vegetation beneath colony trees. Nutrient levels were greatly elevated beneath colony trees (especially, those with larger colonies), potentially reaching levels toxic to older trees. However, seedlings thrived in the soil from beneath colony trees. The primary mechanism generating open areas beneath colony trees is disturbance by scavengers (feral pigs and native Turkeys) that are attracted in vast numbers to these nutrient hotspots. Seedlings flourished within exclosures inaccessible to vertebrate herbivores, but were rapidly consumed if unprotected. Our results contrast with previous studies of colonies of seabirds on remote islands, where a lack of large terrestrial herbivores results in bird colonies encouraging rather than eliminating vegetation in areas close to the nesting site. In our continental study system, scavengers may rapidly dilute the spatial heterogeneity generated by the massive nutrient subsidy from bird colonies.
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|a © 2017 The Ecological Society of America
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650 |
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4 |
|a Biological sciences
|x Biology
|x Zoology
|x Animals
|x Birds
|x Starlings
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650 |
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4 |
|a Behavioral sciences
|x Ethology
|x Animal behavior
|x Habitat selection
|x Animal nesting
|x Bird nesting
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650 |
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4 |
|a Biological sciences
|x Biology
|x Botany
|x Dendrology
|x Trees
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650 |
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4 |
|a Biological sciences
|x Agriculture
|x Agricultural sciences
|x Agrology
|x Soil chemistry
|x Soil nutrients
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650 |
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4 |
|a Biological sciences
|x Biology
|x Developmental biology
|x Growth and development
|x Developmental stages
|x Seedlings
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650 |
|
4 |
|a Biological sciences
|x Biology
|x Botany
|x Plant ecology
|x Vegetation
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650 |
|
4 |
|a Biological sciences
|x Biology
|x Botany
|x Plant ecology
|x Vegetation
|x Vegetation structure
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650 |
|
4 |
|a Biological sciences
|x Biology
|x Botany
|x Plant biochemistry
|x Plant nutrition
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650 |
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4 |
|a Biological sciences
|x Biology
|x Zoology
|x Animals
|x Mammals
|x Ungulates
|x Swine
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650 |
|
4 |
|a Biological sciences
|x Biology
|x Botany
|x Plant ecology
|x Vegetation
|x Vegetation structure
|x Plant strata
|x Vegetation canopies
|x Forest canopy
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655 |
|
4 |
|a research-article
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700 |
1 |
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|a Lyons, Jessica Ann
|e verfasserin
|4 aut
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700 |
1 |
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|a Brown, Gregory P.
|e verfasserin
|4 aut
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700 |
1 |
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|a Shine, Richard
|e verfasserin
|4 aut
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773 |
0 |
8 |
|i Enthalten in
|t Ecology
|d Duke University Press
|g 98(2017), 2, Seite 382-392
|w (DE-627)311927165
|w (DE-600)2010140-5
|x 19399170
|7 nnns
|
773 |
1 |
8 |
|g volume:98
|g year:2017
|g number:2
|g pages:382-392
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856 |
4 |
0 |
|u http://www.jstor.org/stable/26164931
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|d 98
|j 2017
|e 2
|h 382-392
|