نتایج جستجو برای: shallow shelf

تعداد نتایج: 61594  

Journal: :Ecological Indicators 2021

Understanding ecosystem dynamics within shallow shelf seas is of great importance to support marine spatial management natural populations and activities such as fishing offshore renewable energy production combat climate change. Given the possibility future changes, a baseline needed predict ecosystems responses changes. This study uses Bayesian techniques find data-driven estimates interactio...

2003
NANCY SULLIVAN ELLEN PRATT

Networked computer technology has become prevalent in higher education but little research has been conducted to attest to its benefits for the ESL student writer. This study compared students in two ESL writing environments; a networked computer-assisted classroom and a traditional oral classroom. Three measures were used to examine attitudes towards writing with computers, writing apprehensio...

Journal: :Revista de biologia tropical 2005
Carlos E Cintra-Buenrostro Héctor Reyes-Bonilla María Dinorah Herrero-Pérezrul

Species richness is one of the best indicators of biodiversity. However, there are few investigations on concordance of diversity patterns and environmental settings for marine regions. The objectives of this study were to correlate species richness of shallow water (< 200 m deep) sea stars with key oceanographic factors in the Gulf of California, México, and to predict species richness of Aste...

2003
GANQING JIANG NICHOLAS CHRISTIE-BLICK

The Infra Krol Formation and overlying Krol Group constitute a thick (< 2 km), carbonate-rich succession of terminal Proterozoic age that crops out in a series of doubly plunging synclines in the Lesser Himalaya of northern India. The rocks include 18 carbonate and siliciclastic facies, which are grouped into eight facies associations: (1) deep subtidal; (2) shallow subtidal; (3) sand shoal; (4...

2004
John F. Dower

Rather than being evenly spread throughout the ocean, the distribution of fish and plankton biomass is generally quite patchy. In most parts of the ocean, horizontal and vertical gradients exist, such that biomass (and diversity) generally decrease as one moves further offshore or deeper in the water column. The general explanation underlying these trends is that primary and secondary productio...

2012
Michał Zatoń Olev Vinn Alexandru M.F. Tomescu

Microconchids are an extinct group of Spirorbis-like tentaculitoid tubeworms that dwelled in a variety of aquatic environments, ranging from normal marine, through brackish and hypersaline, to freshwater. An analysis of published microconchid occurrences focusing on their ecology and palaeoenvironmental distribution through geological time is conducted in order to establish the timing of microc...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2013
Sergio Contreras Patrick Meister Bo Liu Xavier Prieto-Mollar Kai-Uwe Hinrichs Arzhang Khalili Timothy G Ferdelman Marcel M M Kuypers Bo Barker Jørgensen

The coupling of subseafloor microbial life to oceanographic and atmospheric conditions is poorly understood. We examined diagenetic imprints and lipid biomarkers of past subseafloor microbial activity to evaluate its response to glacial-interglacial cycles in a sedimentary section drilled on the Peruvian shelf (Ocean Drilling Program Leg 201, Site 1229). Multiple and distinct layers of diagenet...

2014
Kara L. Dodge Benjamin Galuardi Timothy J. Miller Molly E. Lutcavage

Leatherback sea turtles, Dermochelys coriacea, are highly migratory predators that feed exclusively on gelatinous zooplankton, thus playing a unique role in coastal and pelagic food webs. From 2007 to 2010, we used satellite telemetry to monitor the movements and dive behavior of nine adult and eleven subadult leatherbacks captured on the Northeast USA shelf and tracked throughout the Northwest...

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