NDLI: Nazca Booby (Sula granti) inputs maintain the terrestrial food web of Malpelo Island

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Nazca Booby (Sula granti) inputs maintain the terrestrial food web of Malpelo Island

Content Provider	Springer Nature Link
Author	López Victoria, Mateo Wolters, Volkmar Werding, Bernd
Copyright Year	2009
Abstract	Most of the known food webs are based on organic compounds provided by photoautotrophic organisms. The terrestrial ecosystem of Malpelo Island (Colombia) seems to be an exception, however, since it supports several trophic guilds without hosting an adequate amount of primary producers. It has been suggested that this apparent paradox might be explained by external inputs provided by seabirds, namely Nazca Boobies (Sula granti), forming a huge colony on Malpelo. This hypothesis has never been tested. Here, we present a first approach to quantify the significance of Nazca Booby inputs into the Malpelo ecosystem via excrement, second eggs/chicks (which are prone to die), and carcasses, respectively, during the major breeding season. The total input was calculated to amount to 171.6 t per breeding season, with excrements accounting for almost 99% (170 t) of this input. Second eggs/chicks contributed approximately 1.1 t (0.64%) and carcasses around 0.1 t (0.06%). These finding support the idea of the Nazca Booby facilitating a food chain that pairs the pelagic primary producers of the open ocean with the terrestrial consumers of an island. Species most strongly profiting from this process include three endemic lizard species (Anolis agassizi, Diploglossus millepunctatus, Phyllodactylus transversalis) and the land crab (Johngarthia malpilensis).
Starting Page	865
Ending Page	870
Page Count	6
File Format	PDF
ISSN	00218375
Journal	Journal für Ornithologie
Volume Number	150
Issue Number	4
e-ISSN	14390361
Language	English
Publisher	Springer-Verlag
Publisher Date	2009-04-25
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Sula granti Eggs/chicks Excrement Allochthonous inputs Food web Evolutionary Biology Animal Ecology Zoology
Content Type	Text
Resource Type	Article
Subject	Animal Science and Zoology

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