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Are Trophic Cascades All Wet? Differentiation and Donor‐Control in Speciose Ecosystems

Are Trophic Cascades All Wet? Differentiation and Donor‐Control in Speciose Ecosystems June 1992 TOP-DOWN AND BOTTOM-UP FORCES Ecology, 73(3), 1992, pp. 747-754 © 1992 by the Ecological Society of America ARE TROPHIC CASCADES ALL WET? DIFFERENTIATION AND DONOR-CONTROL IN SPECIOSE ECOSYSTEMS DONALD R. STRONG Bodega Marine Laboratory, Box 247, Bodega Bay, California 94923 USA base and are aquatic. Analogously, Carney (1990) has INTRODUCTION argued that lenitic cascades are restricted to meso­ Trophic cascades mean runaway consumption, trophic lakes. The corollary of my assertion is not nec­ downward dominance through the food chain. Es­ essarily that top-down forces are unimportant. Rather, pecially vulnerable are the autotrophs. Standing crop consumption is so differentiated in speciose systems and coverage of the plant community are reduced that its overall effects are buffered. Much buffering must wholesale when one or a few species of potent herbi­ come from defensive adaptations of the autotrophs in vores are not suppressed. In archetypical trophic cas­ higher diversity systems, of corals and higher plants, cades, overwhelming effects propagate down through adaptations not well developed by the algae and other three trophic levels. Primary carnivores or diseases, by lower plants that are involved in trophic cascades. I suppressing herbivores, switch the substrate from open propose that differentiation and other sorts http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Ecology Wiley

Are Trophic Cascades All Wet? Differentiation and Donor‐Control in Speciose Ecosystems

Strong, Donald R.
Ecology , Volume 73 (3) – Jun 1, 1992
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References (43)

Publisher
Wiley
Copyright
"© Society for Community Research and Action"
ISSN
0012-9658
eISSN
1939-9170
DOI
10.2307/1940154
Publisher site
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Abstract

June 1992 TOP-DOWN AND BOTTOM-UP FORCES Ecology, 73(3), 1992, pp. 747-754 © 1992 by the Ecological Society of America ARE TROPHIC CASCADES ALL WET? DIFFERENTIATION AND DONOR-CONTROL IN SPECIOSE ECOSYSTEMS DONALD R. STRONG Bodega Marine Laboratory, Box 247, Bodega Bay, California 94923 USA base and are aquatic. Analogously, Carney (1990) has INTRODUCTION argued that lenitic cascades are restricted to meso­ Trophic cascades mean runaway consumption, trophic lakes. The corollary of my assertion is not nec­ downward dominance through the food chain. Es­ essarily that top-down forces are unimportant. Rather, pecially vulnerable are the autotrophs. Standing crop consumption is so differentiated in speciose systems and coverage of the plant community are reduced that its overall effects are buffered. Much buffering must wholesale when one or a few species of potent herbi­ come from defensive adaptations of the autotrophs in vores are not suppressed. In archetypical trophic cas­ higher diversity systems, of corals and higher plants, cades, overwhelming effects propagate down through adaptations not well developed by the algae and other three trophic levels. Primary carnivores or diseases, by lower plants that are involved in trophic cascades. I suppressing herbivores, switch the substrate from open propose that differentiation and other sorts

Journal

Ecology – Wiley

Published: Jun 1, 1992

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