Marine megaherbivore grazing may increase seagrass tolerance to high nutrient loads
نویسندگان
چکیده
منابع مشابه
Nutrient and grazing influences on a subtropical seagrass community
Nutrient and grazing levels were manipulated in a 10 wk field experiment at 2 sites in a subtropical lagoon in Bermuda to evaluate their relative effects on the abundance and growth of the dominant seagrass and macroalgae. One site was eutrophic, the other mesotrophic to oligotrophc. Nutrients were added to the sediment-water interface using slow-release fertilizer, and the dominant herbivores ...
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Excess nutrients are potential factors that drive phase shifts from seagrasses to macroalgae. We carried out a manipulative field experiment to study the effects of macroalgae Ulva pertusa loading and nutrient addition to the water column on the nitrogen (N) and carbon (C) contents (i.e., fast indicators) as well as on the morphology and structure (i.e., slow indicators) of Zostera marina. Our ...
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Data on nutrient contents of 27 seagrass species at 30 locations were compiled from the literature. Mean (f SE) concentrations of carbon, nitrogen and phosphorus in seagrass leaves were 33.6 2 0.31, 1.92 f 0.05, and 0.23 2 0.011 % dry wt, respectively. The median C:N:P ratio was 474 :24: 1, which represents a C:P ratio more than 4 times, and a N:P ratio more than 1.5 times that of oceanic sesto...
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Total epiphyte load, epiphyte chlorophyll load, epiphyte autotrophic ~ n d e x and seagrass short shoot size are compared with water column nutrient concentrations and the elemental composition of seagrass leaf tlssue The spa t~a l patterns ~n these parameters are described across a nutrlent ava~lability gradlent In Flonda Bay, Flor~da, USA Multivanate and un~var ia te statistical analyses were...
متن کاملFollowing federal guidelines to increase nutrient consumption may lead to higher food costs for consumers.
The federal Dietary Guidelines for Americans, 2010, emphasized the need for Americans to consume more potassium, dietary fiber, vitamin D, and calcium, and to get fewer calories from saturated fat and added sugar. We examined the economic impact of meeting these guidelines for adults in King County, Washington. We found that increasing consumption of potassium--the most expensive of the four re...
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ژورنال
عنوان ژورنال: Journal of Ecology
سال: 2011
ISSN: 0022-0477
DOI: 10.1111/j.1365-2745.2011.01900.x