نتایج جستجو برای: aquatic plants

تعداد نتایج: 226596  

2015
Jonas Schoelynck Sara Puijalon Patrick Meire Eric Struyf

The response of aquatic plants to abiotic factors is a crucial study topic, because the diversity of aquatic vegetation is strongly related to specific adaptations to a variety of environments. This biodiversity ensures resilience of aquatic communities to new and changing ecological conditions. In running water, hydrodynamic disturbance is one of the key factors in this context. While plant ad...

ژورنال: زیست شناسی ایران 2018

Sound travels very efficiently underwater, so the potential area impacted can be thousands of square kilometers or more. Anthropogenic activities such as commercial shipping, recreational activities, drilling, seismic exploration or energy production (hydroelectric power plants), have made underwater noise pollution an increasing and perhaps dominant factor in the aquatic environment. Nowadays,...

2009
Patrick D. Biber

Salvinia molesta Mitchell, a floating invasive aquatic plant, is one of the top 10 worst invasive aquatic weeds in the world. It was discovered in the lower Pascagoula River in 2005 and evidence suggests that this non-native species is spreading along the northern Gulf of Mexico. These plants exhibit rapid growth and nutrient uptake rates, allowing them to out compete other plants in similar ha...

1999
John Madsen

The use of quantitative methods for aquatic plants has not become as standardized as other components in the aquatic ecosystem, such as biotic (e.g., fish) or physical components (e.g., water chemistry) (APHA 1995, Lind 1979, Wetzel and Likens 1991). Even when considering aquatic biomass sampling, which is a widely accepted means of quantifying aquatic plant communities, there is considerable d...

2010
O. Miler I. Albayrak V. Nikora M. O’Hare T. Crane

Aquatic vegetation in rivers often modifies hydraulic resistance and can enhance seasonally occurring flooding. To which extent a plant constitutes an obstacle in the flow is strongly influenced by its biomechanical traits which determine the ability of plants to reconfigure in the flow, i.e. to adopt a shape that minimizes drag forces and hence to smooth the flow dynamics in and around submerg...

2017
Qian-Jin Cao Fang-Fang Mei Ling Wang

Many aquatic plant species are distributed over large areas and diverse environments with populations interconnected by abiotic and biotic mediators. Here, we examined differences and similarities in the population genetic structure of six sympatric and widespread aquatic plant species. We sampled the aquatic species from six Chinese lakes found on plateaus, plains, and different river systems ...

ژورنال: بوم شناسی آبزیان 2014

A group of unicellular ciliates such Epistylis are amplified at aquatic environment by governor of food contamination. In the case, fixed ciliates like Epistylis are colonized as Ectoparasites on fishes, Aquatic crustaceans, Turtle and Aquatic plants. They graze food residue or bacteria or decompose residue like Ectoparasites. In this case, Epistylis licking their stems to the surface body of f...

Journal: :Remote Sensing 2014
Elijah K. Cheruiyot Collins Mito Massimo Menenti Ben G. H. Gorte Roderik Koenders Nadia Akdim

Delineation of aquatic plants and estimation of its surface extent are crucial to the efficient control of its proliferation, and this information can be derived accurately with fine resolution remote sensing products. However, small swath and low observation frequency associated with them may be prohibitive for application to large water bodies with rapid proliferation and dynamic floating aqu...

2000
Dean W. Boening

Mercury at low concentrations represents a major hazard to microorganisms. Inorganic mercury has been reported to produce harmful e€ects at 5 lg/l in a culture medium. Organomercury compounds can exert the same e€ect at concentrations 10 times lower than this. The organic forms of mercury are generally more toxic to aquatic organisms and birds than the inorganic forms. Aquatic plants are a€ecte...

2018
Haihao Yu Ligong Wang Chunhua Liu Shufeng Fan

Understanding the biotic and abiotic factors that influence the susceptibility of a community to invasion is beneficial for the prediction and management of invasive species and the conservation of native biodiversity. However, the relationships between factors and invasibility of a community have not been fully confirmed, and the factors most associated with the susceptibility of a community t...

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