The epifauna of megaripples: species' adaptations and population responses to disturbance
作者:
S. A. SHEPHERD,
期刊:
Australian Journal of Ecology
(WILEY Available online 1983)
卷期:
Volume 8,
issue 1
页码: 3-8
ISSN:0307-692X
年代: 1983
DOI:10.1111/j.1442-9993.1983.tb01513.x
出版商: Blackwell Publishing Ltd
数据来源: WILEY
摘要:
AbstractStrong tidal currents flowing over mobile sediment give rise to migrating bedforms termed megaripples and sandwaves. For colonizing epifauna a megaripple field is a habitat subject to repeated disturbance as advancing megaripples bury all epifauna in their path. Eight epifaunal species occur in a megaripple field in tipper Spencer Gulf, South Australia. The stalked bryozoanLanceopora obliquais an r‐strategist and occurs patchily in high densities. An ascidianPolycarpa pedunculata, probably a K‐strategist, and a group of four species of articulated bryozoans, have much lower population densities which are predictable according to the frequency of disturbance. Other species occur in low, but variable densities. Some species show adaptations in morphology, behaviour or life history patterns which favour survival in this unusual environm
点击下载:
PDF
(5970KB)
返 回