Arid
DOI10.1111/j.0906-7590.2006.04546.x
Structure of a plant-pollinator network on a pahoehoe lava desert of the Galapagos Islands
Philipp, Marianne; Bocher, Jens; Siegismund, Hans R.; Nielsen, Lene R.
通讯作者Philipp, Marianne
来源期刊ECOGRAPHY
ISSN0906-7590
出版年2006
卷号29期号:4页码:531-540
英文摘要

Plant-pollinator interactions are important for the evolution and survival of the species involved. Plant-pollinator networks on oceanic islands are often small in size and as a consequence the connectance is high suggesting a substantial generalisation level. Further, linkage level for insular plants is shown to be lower than on mainland. The present study investigates a plant-pollinator network on the Galdpagos Islands that is unique because of its very small size. We recorded pollinator visits to plant species as well as pollen grains on insect bodies. The combination of these data increased the observed number of interactions. The values for connectance and linkage level for plants were found to be consistent with similar values found in other network studies. There were no relation between the abundance of plant species and the number of pollinating species. The dominating pollinator species was the Galdpagos carpenter bee Xylocopa darwini. Specimens of the shorthorned grasshopper Halmenus cuspidatus turned out to carry pollen from five plant species out of twelve and are probably functioning as pollinator. Bagging experiments revealed dependency on insect visits for a high seed set for most of the plant species, but only one species Plumbago scandens seemed to possess a pollen limited seed set. The network showed an asymmetric pattern of number of interactions per species with a few species having several interactions and many species a few. This pattern is supposed to result in a rather robust community, but is also fairly sensitive if the dominant species are threatened. The high connectance value found could, however, counteract this vulnerability.


类型Article
语种英语
国家Denmark
收录类别SCI-E
WOS记录号WOS:000240733600008
WOS关键词MUTUALISTIC NETWORKS ; SCALESIA-AFFINIS ; FOOD WEBS ; ASTERACEAE ; CONNECTANCE ; PATTERNS ; LIZARDS
WOS类目Biodiversity Conservation ; Ecology
WOS研究方向Biodiversity & Conservation ; Environmental Sciences & Ecology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/151216
作者单位(1)Univ Copenhagen, Inst Biol, DK-2100 Copenhagen O, Denmark;(2)Nat Hist Museum Denmark, DK-2100 Copenhagen, Denmark
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GB/T 7714
Philipp, Marianne,Bocher, Jens,Siegismund, Hans R.,et al. Structure of a plant-pollinator network on a pahoehoe lava desert of the Galapagos Islands[J],2006,29(4):531-540.
APA Philipp, Marianne,Bocher, Jens,Siegismund, Hans R.,&Nielsen, Lene R..(2006).Structure of a plant-pollinator network on a pahoehoe lava desert of the Galapagos Islands.ECOGRAPHY,29(4),531-540.
MLA Philipp, Marianne,et al."Structure of a plant-pollinator network on a pahoehoe lava desert of the Galapagos Islands".ECOGRAPHY 29.4(2006):531-540.
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