Search results for "plank"

Concurrent environmental stressors and jellyfish stings impair caged European sea bass (Dicentrarchus labrax) physiological performances

2016

9 pages, 5 figures, 4 tables

The bivalve <i>Glycymeris planicostalis</i> as a high-resolution paleoclimate archive for the Rupelian (Early Oligocene) …

2015

Abstract. Current global warming is likely to result in a unipolar glaciated world with unpredictable repercussions on atmospheric and oceanic circulation patterns. These changes are expected to affect seasonal extremes and the year-to-year variability of seasonality. To better constrain the mode and tempo of the anticipated changes, climatologists require ultra-high-resolution proxy data of time intervals in the past, e.g., the Oligocene, during which boundary conditions were similar to those predicted for the near future. In the present paper, we assess whether such information can be obtained from shells of the long-lived bivalve mollusk Glycymeris planicostalis from the late Rupelian of…

Characterization of paralytic shellfish toxins in seawater and sardines (Sardina pilchardus) during blooms of Gymnodinium catenatum

2010

The effect of environmental uncertainty and diapause investment on the occurrence of specialist and generalist species

2014

The evolution of specialist and generalist strategies is a central topic in ecology with strong implications for the biodiversity and structure of communities. Environmental unpredictability has been suggested as a key factor affecting the relative advantages of generalist species. However, life cycle features, like diapause, can also play a major role in the competitive dynamics between generalists and specialists. Zooplanktonic communities of continental waters are suitable models to study this; they inhabit water bodies that vary temporally with different degrees of uncertainty and rely on the production of diapause stages to survive across the year. We developed a simple theoretical mod…

Mercury and chlorinated hydrocarbons in the food chain of Lake Paijanne, Finland

1978

The sediments and various organisms in Lake Paijanne were examined for contaminants. The average mercury content of water plants was 9, of plankton 14, of sediment 114, of zoobenthic predators 83, of fish 332–1510 and of birds 240–13685 μg kg−1 (wet weight). The average PCB content of plants was 3, of plankton 21, of the zoobenthos 44, of fish 36-117 and of birds 219–13490 μg kg−1. The average ΔDDT content of plants was 0.5, of plankton 6, of the zoobenthos 14, of fish 7–42 and of birds 144-8262 μg kg−1. Regional differences in mercury content were most pronounced in sediment and fish. PCB concentration was highest near a town. ΔDDT was quite evenly distributed. Water plant species did not …

Latvijas ūdeņu vides pētījumi un aizsardzība: Referātu tēžu krājums

2016

Latvijas ūdeņu vides pētījumu un aizsardzība: referātu tēžu krājums (Rīga, 2020.gada 24. janvāris)

2020

Latvijas ūdeņu vides pētījumi un aizsardzība: referātu tēžu krājums (Rīga, 2014.gada 31.janvāris)

2014

Rīgas līča un Baltijas jūras zooplanktona daudzgadīgā dinamika un to kontrolējošie vides faktori

2005

Promocijas darbs – publikāciju kopsavilkums

2009

ANOTACIJA Mezozooplanktona struktura un funkcionala loma Baltijas juras piekrastes ekosistema Solvita Strake Zooplanktonam ir „atslegas” loma pelagiskaja bariba kede nodrošinot organisko vielu apriti starp fotosintezejošu vienšunas algi un augstakajiem trofiskas kedes limeniem ka, piemeram, komercialajai zvejai svarigakajam pelagisko zivju sugam. Lai gan atseviškos Baltijas juras rajonos tiek veikti ilggadigi zooplanktona noverojumi un analizetas datu rindas, tradicionalie monitoringa noverojumi neatbild uz daudziem ar zooplanktona ekologiju saistitiem jautajumiem. Darba merkis ir noskaidrot maz petitus Baltijas juras mezozooplanktona ekologijas jautajumus, lai izprastu ta lomu ekosistemas …