نتایج جستجو برای: benthos
تعداد نتایج: 941 فیلتر نتایج به سال:
The diatom Berkeleya transfretana is described as a new species from samples collected at Playa Punta Sauciño, an intertidal coastal area in Ceuta, North Africa. Its main features are the comparatively small size relation to other and very fine dense striae pattern (more than 40 per 10 µm). here under light scanning electron microscopy compared related taxa. benthos of these rocky beaches inter...
Antarctic and Southern Ocean (ASO) marine ecosystems have been changing for at least the last 30 years, including in response to increasing ocean temperatures and changes in the extent and seasonality of sea ice; the magnitude and direction of these changes differ between regions around Antarctica that could see populations of the same species changing differently in different regions. This art...
Recent advances in physical oceanography, sampling and observation tools, and data management methods are sufficient to enable a wide range of organisms in the Gulf of Maine to be quantified and related both to other organisms and to the physical habitat. A pilot Census of marine life in the Gulf of Maine would advance the goals of ecosystem understanding and management in a timely manner. A pr...
Surveys of benthic marine habitats encompassing 1814.7 ha and lining 90% of Dominica's shoreline were carried out to build the first composite picture of the distribution and size of the island's near-shore sublittoral habitats, and the epibenthic communities they harbor. Field survey sites covered areas ranging from 1425 to 29.6 ha, lining the shore in bands ranging between 50 and 250 m in wid...
Aquaculture, as a means of food production, is growing rapidly in response to an increasing demand for protein and the over-exploitation of wild fisheries. This expansion includes mussels (family Mytilidae) where production currently stands at 1.5 million tonnes per annum. Mussel culture is frequently perceived as having little environmental impact yet mussel biodeposits and shell debris accumu...
Trophic interactions play a critical role in the structure and function of ecosystems. Given the widespread loss of biodiversity due to anthropogenic activities, understanding how trophic interactions respond to natural gradients (e.g., abiotic conditions, species richness) through large-scale comparisons can provide a broader understanding of their importance in changing ecosystems and support...
A five-band short-range multispectral sensor (MicaSense RedEdge-M) was adapted to an underwater housing and used obtain data from coral reef benthos. Artificial illumination required most of the spectral range sensor; optimal distance for obtaining these 0.5 m, bottom. Multispectral orthomosaics were developed using structure-from-motion software; have advantage producing ultra-high spatial res...
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