Results 31 to 40 of about 22,736 (103)

Exotic species of zooplankton in the Upper Paraná River floodplain, Daphnia lumholtzi Sars, 1885 (Crustacea: Branchiopoda) [PDF]

open access: yes, 2009
The integrity of aquatic ecosystems is being challenged worldwide by invading species, which has been one of the frequent causes of biodiversity loss. The invader may cause extinctions of vulnerable native species through predation, grazing, competition ...
ABUJAMRA F.   +68 more
core   +4 more sources

Morphological abnormalities in cladocerans related to eutrophication of a tropical reservoir

open access: yesJournal of Limnology, 2016
In zooplankton communities, morphological changes in Cladocera (Crustacea: Branchiopoda) may be resulting from water pollution by anthropogenic activities and/or natural events.
Rômulo R.R. de Melo   +4 more
doaj   +1 more source

Summer mid-day-night composition and abundance of zooplankton from Lake Ikeda, Japan [PDF]

open access: yes, 2002
Variations between midday and midnight in the species composition and abundance of the main zooplankton assemblage of Lake Ikeda, a crater-lake were analyzed during the summer of 1986.
Shaharudin, Abdul Razak, Toshio, Saisho
core  

Produtividade primária em um lago tropical raso brasileiro: experimentos no lago e em mesocosmos [PDF]

open access: yes
AIM: To evaluate the primary productivity of the phytoplankton in the Lake Monte Alegre, southeastern Brazil, and the factors that influence its fluctuations, experiments were carried out in the lake and in mesocosm; METHODS: Primary productivity rates ...
ARCIFA, Marlene Sofia   +3 more
core   +1 more source

Predicting the invasive potential of the cladoceran Daphnia lumholtzi Sars, 1885 (Crustacea: Cladocera: Daphniidae) in the Neotropics: are generalists threatened and relicts protected by their life-history traits? [PDF]

open access: yes, 2016
Invasive species are one of the major threats to biodiversity, which is aggravated in poorly known groups, such as cladocerans. Daphnia lumholtzi Sars (Cladocera: Anomopoda: Daphniidae) is currently invading the Neotropical region, and there are few ...
Alexandre V. Palaoro   +3 more
core   +2 more sources

Temporary collapse of the Daphnia population in turbid and ultra-oligotrophic Lake Brienz [PDF]

open access: yes, 2018
.: The cyclical parthenogen Daphnia is a key species in aquatic food webs. Its abundance is influenced by environmental factors like food quantity and quality, predation, diseases, temperature and washout by discharge.
Bürgi, Hans   +4 more
core  

Starving with a full gut? Effect of suspended particles on the fitness of Daphnia hyalina [PDF]

open access: yes, 2018
Suspended particles are abiotic factors that can affect the abundance of cladocerans such as daphnids. Ultra-oligotrophic Lake Brienz, situated in the front ranges of the Swiss Alps, is dominated by two major inflows that annually transport over 300,000 ...
Rellstab, Christian, Spaak, Piet
core  

Effects of climate on size structure and functioning of aquatic food webs [PDF]

open access: yes, 2010
In aquatic food webs, the role of body size is notoriously strong. It is also well known that temperature has an effect on body size. For instance, Bergmann’s rule states that body size increases from warm to cold climates.
Lacerot, G.
core  

Predation on microcrustaceans in evidence: the role of chaoborid larvae and fish in two shallow and small Neotropical reservoirs [PDF]

open access: yes, 2012
This study was focused on the predation upon microcrustaceans by an invertebrate predator (chaoborid larvae), and vertebrate predators (fish), in two small reservoirs in southeastern Brazil, with and without macrophytes, in two climatic periods (dry and ...
Arcifa, Marlene Sofia   +2 more
core   +2 more sources

Cycle characteristics of planktonic cladocerans in a tropical lake, Central Amazon: Field and experimental work [PDF]

open access: yes, 1989
This thesis is concerned with an investigation into the effects of food concentration, temperature and turbidity on the life cycle characteristics such as growth, body size, development and reproduction of species of planktonic Cladocera brought to the U.
Hardy, Elsa Rodrigues
core  

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