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Growth And Persistence Of Diverse Intertidal Crusts: Survival Of The Slow In A Fast-Paced World, M. N. Dethier, Robert Steneck
Growth And Persistence Of Diverse Intertidal Crusts: Survival Of The Slow In A Fast-Paced World, M. N. Dethier, Robert Steneck
Marine Sciences Faculty Scholarship
Encrusting algae are conspicuous components of hard-substratum benthic communities in the photic zone despite being poor competitors and slow growers. Little is known about their growth rates or about mechanisms controlling key processes such as wound healing and surviving overgrowth. We manipulated 12 crustose species (including red and brown algae and a lichen) from the intertidal zone of Washington, USA, studying their varying responses to identical experimental conditions. Three of 8 crust species tested showed increased growth rates with size. Species healed from standardized wounds at different rates and using different mechanisms (e.g. lateral vs vertical regeneration) as seen in …
Long-Term Aspen Exclosures In The Yellowstone Ecosystem, Charles E. Kay
Long-Term Aspen Exclosures In The Yellowstone Ecosystem, Charles E. Kay
Aspen Bibliography
Aspen has been declining in the Yellowstone Ecosystem for more than 80 years. Some authors have suggested that aspen is a marginal plant community in Yellowstone and that recent climatic variation has adversely affected aspen, while others contend that excessive browsing by native ungulates is primarily responsible for aspen’s widespread decline. To test these hypotheses, I measured all the long-term aspen exclosures (n = 14) in the Yellowstone Ecosystem. Aspen stands inside all exclosures successfully produced new stems greater than 2 m tall without fire or other disturbance, while few outside stands successfully regenerated due to repeated browsing. Understory species …