نتایج جستجو برای: littoral zone

تعداد نتایج: 113239  

Journal: :Journal of fish biology 2009
A Dupuch P Magnan A Bertolo L M Dill M Proulx

This study investigated the relationship between spatial variations in predation risk and abundance of northern redbelly dace Phoxinus eos at both macroscale (littoral v. pelagic zones) and microscale (structured v. open water habitats in the littoral zone) of Canadian Shield lakes. Minnow traps were placed in both structured and open water habitats in the littoral zone of 13 Canadian Shield la...

Journal: :Brazilian journal of biology = Revista brasleira de biologia 2008
P M Maia-Barbosa R S Peixoto A S Guimarães

The present study was carried out in Lake Dom Helvécio, in the state of Minas Gerais, with two main objectives: to demonstrate the contribution of the littoral zone, in order to better characterize zooplankton fauna; and to assess the distribution of zooplankton species in different habitats, i.e., the littoral zone with and without aquatic vegetation. The samples were collected in February and...

2008
John D. Madsen R. Michael Stewart Kurt D. Getsinger Robert L. Johnson Ryan M. Wersal

A point-intercept survey was implemented in August 2000 to determine the distribution and richness of aquatic plant species present in Waneta Lake and Lamoka Lake, NY. Myriophyllum spicatum (Eurasian watermilfoil) was the most commonly observed species in Waneta Lake (25% of entire lake, 78% of littoral zone) and Lamoka Lake (43% of entire lake, 77% of littoral zone). Eurasian watermilfoil biom...

2012
Ng Haig They David da Motta Marques Rafael Siqueira Souza

Macrophytes are important sources of dissolved organic carbon (DOC) to littoral zones of lakes, but this DOC is believed to be mostly refractory to bacteria, leading to the hypothesis that bacterial metabolism is different in littoral and pelagic zones of a large subtropical shallow lake. We tested this hypothesis by three approaches: (I) dissolved inorganic carbon (DIC) accumulation in littora...

2016
Danielle Mayer Zvy Dubinsky David Iluz

In a littoral cave system, abiotic environmental properties, such as the intensity and spectral distribution of light, often change going from the exterior to the interior part of the cave, filtering the light and thus creating a deep-sea irradiance setting for marine flora. In this mini-review, we suggest that the supralittoral zone in littoral caves might provide a sanctuary for mesophotic ca...

1999
J. D P. M

Genetic data suggest that the littoral and pelagic forms of brook charr Salvelinus fontinalis in Lake Bondi are two populations with partial reproductive isolation and non-random mating. Genetic differentiation between the two groups was supported by differences in allele frequencies and by deviation from Hardy–Weinberg equilibrium when the two groups were pooled; no such deviation was observed...

N. Talebbeydokhti and M. Nikmanesh,

In this paper, longshore sediment transport in littoral zones is investigated. For investigation of sediment transport in the nearshore zone, the effects of waves, currents and topographical conditions of coast are considered. Linear wave theory was used for the investigation of the wave behaviour. Governing equations of littoral current are continuity and momentum ones. For calculating concent...

2006
Martin J. Jennings Clayton Edwards

Jennings, M. J., E. E. Emmons, G. R. Hatzenbeler, C. Edwards and M. A. Bozek. 2001. Is littoral habitat affected by residential development and landuse in watersheds of Wisconsin lakes? Lake and Reserv. Manage. 19(3):272279. We measured differences in nearshore littoral zone habitat among lakes with different amounu; of residential development and different patterns of watershed land use. Sampl...

N. Talebbeydokhti and M. Nikmanesh,

In this paper, longshore sediment transport in littoral zones is investigated. For investigation of sediment transport in the nearshore zone, the effects of waves, currents and topographical conditions of coast are considered. Linear wave theory was used for the investigation of the wave behaviour. Governing equations of littoral current are continuity and momentum ones. For calculating concent...

Journal: :Brazilian journal of biology = Revista brasleira de biologia 2003
M Serafim Júnior C C Bonecker D C Rossa F A Lansac-Tôha C L Costa

Rotifers present a high diversity in freshwater ecosystems. This study registered 11 genera and 42 species, new records for the Upper Paraná River floodplain. These results showed an increase in rotifer diversity in this ecosystem from 184 to 230 species. Among them some were registered only in the rivers and others in the lagoons. Thirty-seven species occurred in the littoral zone and 34 speci...

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