The lateral extent of the subsidy from an upland stream to riparian lycosid spiders
Adult aquatic insects emerging from streams can subsidize riparian food webs, but little is known of the spatial extent of these subsidies. Stable isotope (15 N) enrichment of aquatic insects, principally a species of stonefly (Plecoptera: Leuctridae), emerging from an upland stream was used to trac...
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| Veröffentlicht in: | Ecography (Copenhagen) 2005-04, Vol.28 (2), p.165-170 |
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| container_title | Ecography (Copenhagen) |
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| creator | Briers, Robert A. Cariss, Helen M. Geoghegan, Rory Gee, John H. R. |
| description | Adult aquatic insects emerging from streams can subsidize riparian food webs, but little is known of the spatial extent of these subsidies. Stable isotope (15 N) enrichment of aquatic insects, principally a species of stonefly (Plecoptera: Leuctridae), emerging from an upland stream was used to trace the subsidy from the stream ecosystem to riparian spiders (Lycosidae). The downstream profile of spider δ 15 N correlated closely with that of adult stoneflies, indicating that they were deriving nutrition from aquatic sources. The contribution of adult aquatic insects to spider diets was determined using a two-source mixing model. Adult aquatic insects made up over 40% of spider diets adjacent to the stream, but |
| doi_str_mv | 10.1111/j.0906-7590.2005.04020.x |
| format | Article |
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R.</creatorcontrib><title>The lateral extent of the subsidy from an upland stream to riparian lycosid spiders</title><title>Ecography (Copenhagen)</title><addtitle>Ecography</addtitle><description>Adult aquatic insects emerging from streams can subsidize riparian food webs, but little is known of the spatial extent of these subsidies. Stable isotope (15 N) enrichment of aquatic insects, principally a species of stonefly (Plecoptera: Leuctridae), emerging from an upland stream was used to trace the subsidy from the stream ecosystem to riparian spiders (Lycosidae). The downstream profile of spider δ 15 N correlated closely with that of adult stoneflies, indicating that they were deriving nutrition from aquatic sources. The contribution of adult aquatic insects to spider diets was determined using a two-source mixing model. Adult aquatic insects made up over 40% of spider diets adjacent to the stream, but <1% at 20 m from the stream. Enrichment of riparian spiders declined exponentially with distance from the stream channel. Aquaticterrestrial subsidies were spatially restricted, but locally important, to riparian lycosid spiders at the study site.</description><subject>Adult insects</subject><subject>Animal and plant ecology</subject><subject>Animal, plant and microbial ecology</subject><subject>Aquatic insects</subject><subject>Biological and medical sciences</subject><subject>Food webs</subject><subject>Fresh water ecosystems</subject><subject>Freshwater</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>General aspects</subject><subject>Highlands</subject><subject>Isotopes</subject><subject>Predators</subject><subject>Spiders</subject><subject>Stream channels</subject><subject>Streams</subject><subject>Subsidies</subject><subject>Synecology</subject><issn>0906-7590</issn><issn>1600-0587</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2005</creationdate><recordtype>article</recordtype><recordid>eNqNkEuP0zAUhSMEEmXgH7DwBnYJ13b9yAYJVTMBqZpBooil5VeES9oE29W0_x6HjMoWb67l891zfU9VIQwNLufDvoEWeC1YCw0BYA2sgUBzflatMAeogUnxvFpdoZfVq5T2AJi0XK6qb7ufHg06-6gH5M_ZHzMae5TLazqZFNwF9XE8IH1Ep2nQR4dSjl4fUB5RDJOOoSjDxY4FRWkKzsf0unrR6yH5N0_1pvp-d7vbfK63D92XzadtbddyDbVhvHfSyN5YTMEQ0D3z3LVGEKs5UMcJWxNNncWG01ZTYVmrrXFOtM4IT2-q94vvFMffJ5-yOoRk_VC-6cdTUlhQxluBCygX0MYxpeh7NcVw0PGiMKg5RbVXc0BqDkjNKaq_KapzaX33NEMnq4c-6qMN6V8_51QyAoX7uHCPYfCX__ZXt5uHbr4Wg7eLwT7lMV4NKJdU4nmFepFDyv58lXX8pbiggqkf953adnJ3f0e-qo7-AcoWnzY</recordid><startdate>200504</startdate><enddate>200504</enddate><creator>Briers, Robert A.</creator><creator>Cariss, Helen M.</creator><creator>Geoghegan, Rory</creator><creator>Gee, John H. 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Psychology</topic><topic>General aspects</topic><topic>Highlands</topic><topic>Isotopes</topic><topic>Predators</topic><topic>Spiders</topic><topic>Stream channels</topic><topic>Streams</topic><topic>Subsidies</topic><topic>Synecology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Briers, Robert A.</creatorcontrib><creatorcontrib>Cariss, Helen M.</creatorcontrib><creatorcontrib>Geoghegan, Rory</creatorcontrib><creatorcontrib>Gee, John H. 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The contribution of adult aquatic insects to spider diets was determined using a two-source mixing model. Adult aquatic insects made up over 40% of spider diets adjacent to the stream, but <1% at 20 m from the stream. Enrichment of riparian spiders declined exponentially with distance from the stream channel. Aquaticterrestrial subsidies were spatially restricted, but locally important, to riparian lycosid spiders at the study site.</abstract><cop>Copenhagen</cop><pub>Munksgaard International Publishers</pub><doi>10.1111/j.0906-7590.2005.04020.x</doi><tpages>6</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Ecography (Copenhagen), 2005-04, Vol.28 (2), p.165-170 |
| issn | 0906-7590 1600-0587 |
| language | eng |
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| source | Wiley Journals; JSTOR Archive Collection A-Z Listing; EZB-FREE-00999 freely available EZB journals |
| subjects | Adult insects Animal and plant ecology Animal, plant and microbial ecology Aquatic insects Biological and medical sciences Food webs Fresh water ecosystems Freshwater Fundamental and applied biological sciences. Psychology General aspects Highlands Isotopes Predators Spiders Stream channels Streams Subsidies Synecology |
| title | The lateral extent of the subsidy from an upland stream to riparian lycosid spiders |
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