نتایج جستجو برای: benthic organisms

تعداد نتایج: 103260  

Journal: :ecopersia 2015
yousefali asadpour-ousalou

shahrechay dam is located at 12th km of shahrechay river in urmia. this study was conducted for a year (spring to fall, 2007) to identify different species of benthic organisms in the dam. considering the relevant topographic status like the local depth and water speed, 6 sampling stations were chosen and sampling was done in shallow locations of the river by means of superficial method. in thi...

Journal: :بهره برداری و پرورش آبزیان 0
عباس محمودی فرد دانشکده منابع طبیعی دانشگاه گیلان جاوید ایمانپورنمین دانشکده منابع طبیعی- دانشگاه گیلان حمید علاف نویریان دانشکده منابع طبیعی- دانشگاه گیلان مسلم شریفی نیا عضو باشگاه پژوهشگران جوان و نخبگان رشت، دانشگاه آزاد اسلامی واحد رشت، رشت، ایران کامیاب غلامی دشتکی دانشکده منابع طبیعی- دانشگاه گیلان

biological monitoring using benthic organisms is one of the best and the most inexpensive methods for anthropogenic activities evaluation in aquatic ecosystems. the purpose of present investigation was biological monitoring of shahrud river that was performed in the qazvin province using by macro benthic invertebrates population. in the present investigation macro benthic invertebrate samples w...

Journal: :Frontiers in Marine Science 2023

EDITORIAL article Front. Mar. Sci., 28 March 2023Sec. Marine Ecosystem Ecology Volume 10 - 2023 | https://doi.org/10.3389/fmars.2023.1170230

Journal: :Helgoländer Wissenschaftliche Meeresuntersuchungen 1973

Journal: :Marine pollution bulletin 2013
A Goutte M Chevreuil F Alliot O Chastel Y Cherel M Eléaume G Massé

The concentrations of polychlorinated biphenyls (PCB), hexachlorobenzene (HCB), pentachlorobenzene (PeCB) and polybrominated diphenylethers (PBDE) were described in benthic and pelagic species collected off Adélie Land, Antarctica. Strong differences were observed among species, with reduced PeCB and HCB levels in benthic species, and elevated PCB levels in the Antarctic yellowbelly rockcod, th...

2006
Tu

1.1 This guide covers procedures for measuring the bioac,cumulation of sediment-associatid contaminants by infaunal .invertebrates. Marine, estuarine, and freshwater sediments are a major sink for chemicals that sorb preferentially to particles, 'such as organic compounds with high octanol-waterpartitioning coefficients (KO,) (for example, polychlorinated ,biphenyls (PCBs) and dichlorodiphenylt...

2001
Carmela Cuomo Gabriele A. Zinn

The purpose of this study was to document existing benthic organisms of the lower West River in New Haven and West Haven, Connecticut, in order to enable monitoring of salt marsh restoration. Seventeen sites were sampled between the Chapel Street Bridge and the mouth of the West River during the month of July 1995. All sites contained polychaete worms and other organisms typical of estuarine sy...

Journal: :شیلات 0
لیما طیبی1 1. دانش آموخته دکترای تخصصی شیلات، گروه شیلات، دانشکده منابع طبیعی، دانشگاه تهران، کرج، ایران هادی پورباقر2 2. دانشیار، گروه شیلات، دانشکده منابع طبیعی، دانشگاه تهران، کرج، ایران حمید فرحمند3 3. استاد، گروه شیلات، دانشکده منابع طبیعی، دانشگاه تهران، کرج، ایران غلامرضا رفیعی3 3. استاد، گروه شیلات، دانشکده منابع طبیعی، دانشگاه تهران، کرج، ایران علیرضا میرواقفی3 3. استاد، گروه شیلات، دانشکده منابع طبیعی، دانشگاه تهران، کرج، ایران

the gamasiab river has one of the highest discharge in the western iran receiving wastewater of trout frames. the present study investigated effects of wastewater using bioassessment of benthic organisms. the benthos were sampled over four seasons using a surber sampler on four stations, upstream, on the farm outlet, 500 and 1000 m down the farm outlet. 5454 benthic fauna were identified that w...

2012
Nichole N. Price Todd R. Martz Russell E. Brainard Jennifer E. Smith

Community structure and assembly are determined in part by environmental heterogeneity. While reef-building corals respond negatively to warming (i.e. bleaching events) and ocean acidification (OA), the extent of present-day natural variability in pH on shallow reefs and ecological consequences for benthic assemblages is unknown. We documented high resolution temporal patterns in temperature an...

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