Sedimentation disrupts natural regeneration of Zannichellia palustris in Fall River, California
نویسندگان
چکیده
منابع مشابه
Association of Fall-run Chinook Salmon Redds with Woody Debris in the Lower Mokelumne River, California
Surveys in the lower Mokelumne River during 1994-1995 indicated that fall-run chinook salmon, Oncorhynchus tshawytscha, redds associated with woody debris (WD) had smaller substrate and greater mean depths. Also, the proportion of redds associated with WD was negatively related to stream gradient. Female chinook salmon selected spawning sites containing WD in some instances. Woody debris may ma...
متن کاملحذف بُر آب آلوده توسط دو گیاه آبزی (Zannichellia palustris L. و Ruppia maritima L.)
زمینه و هدف: با افزایش جمعیت نیاز به منابع آب مناسب افزایش یافته است. گیاهان آبزی بومی آبهای ایران نقش به سزایی در خود پالایی منابع آب دارند. گیاهپالایی با گیاهان آبزی روشی موثر و ارزان جهت افزایش کیفیت آبها برای مصارف مختلف است. روش بررسی: در این پژوهش، طی 120 ساعت کشت گلخانهای دو گیاه آبزی زانیشلیا و شورابی در آب آبیاری آلوده‌شده با 4 سطح مختلف آلودگی بُر (0، 1، 5 و 10 میلیگرم در لیتر)، ...
متن کاملWavelet-ANN Model for River Sedimentation Predictions
The observation of peak flows into river or stream system is not straight forward but complex function of hydrology and geology. Accurate suspended sediment prediction in rivers is an integral component of sustainable water resources and environmental systems modeling. Agricultural fields’ fertility decays, rivers capacity decreases and reservoirs are filled due to sedimentation. The observatio...
متن کاملHospitalized fall injuries and race in California.
OBJECTIVE To compare risks for falls and their consequences among four major race/ethnic groups in California. METHODS Cases are 104,902 hospital discharges of California residents with a same level fall injury as the principal external cause of injury. Included are all discharges for a first hospitalization for a given injury in any California non-federal hospital from 1995-97. Analysis incl...
متن کاملComparison of Diets of Prickly Sculpin and Juvenile Fall-run Chinook Salmon in the Lower Mokelumne River, California
I compared diets of prickly sculpin, Cottus asper, and juvenile fall-run chinook salmon, Oncorhynchus tshawytscha, in the lower Mokelumne River, California, from January through June during 1998 and 1999. Prickly sculpin fed primarily on chironomid (Diptera) larvae and hydroptilid and hydropsychid (Trichoptera) larvae. Juvenile chinook salmon fed on zooplankton, plus chironomid, hydroptilid, an...
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ژورنال
عنوان ژورنال: Aquatic Botany
سال: 2002
ISSN: 0304-3770
DOI: 10.1016/s0304-3770(02)00016-5