Tidal dynamics, topographic orientation, and temperature-mediated mass mortalities on rocky shoresстатья из журнала
Аннотация: MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 371:37-46 (2008) - DOI: https://doi.org/10.3354/meps07711 Tidal dynamics, topographic orientation, and temperature-mediated mass mortalities on rocky shores Christopher D. G. Harley* Bodega Marine Laboratory, PO Box 247, Bodega Bay, California 94923, USA Present address: University of British Columbia, Department of Zoology, 6270 University Blvd., Vancouver, British Columbia V6T1Z4, Canada *Email: harley@zoology.ubc.ca ABSTRACT: Temperature is among the main structuring agents on rocky intertidal shores. Although infrequent mortality events associated with high temperatures have been observed in several intertidal taxa, careful documentation of these events is rare, and small-scale variability in mortality patterns remains poorly understood. In Bodega Bay, California, USA, 2 mortality events occurred on exposed rocky shores during the spring of 2004 when low tides occurred around mid-day. Limpets Lottia scabra were killed during unseasonably warm weather in mid-March. In late April, record-high temperatures resulted in widespread mortality of the mussel Mytilus californianus. Levels of mortality for both species were closely associated with small-scale variability in temperature, which in turn was closely associated with substratum orientation. Invertebrates occupying surfaces facing the sun when stress was most intense were much more likely to die than those living on surfaces angled ≥45° away. Because the within-day timing of thermal stress varied seasonally, the highest mortalities were recorded on southwest-facing surfaces on the March afternoon low tide and on southeast-facing surfaces on the April morning low tide. Limpets and mussels showed little mortality during the events that were harmful to the other taxon, suggesting that these different taxa respond to different aspects of their thermal environment. If climate change results in more frequent and more severe episodes of thermal stress, future ecological change may also be heavily dependent on tidal dynamics and small-scale variation in substrate orientation. KEY WORDS: Temperature · Thermal stress · Mass mortality · Substratum orientation · Rocky intertidal zone · Lottia scabra · Mytilus californianus Full text in pdf format PreviousNextCite this article as: Harley CDG (2008) Tidal dynamics, topographic orientation, and temperature-mediated mass mortalities on rocky shores. Mar Ecol Prog Ser 371:37-46. https://doi.org/10.3354/meps07711 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 371. Online publication date: November 19, 2008 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2008 Inter-Research.
Год издания: 2008
Авторы: Christopher D. G. Harley
Издательство: Inter-Research
Источник: Marine Ecology Progress Series
Ключевые слова: Marine Bivalve and Aquaculture Studies, Marine Biology and Ecology Research, Marine and coastal plant biology
Открытый доступ: bronze
Том: 371
Страницы: 37–46