Search results for "whole-lake experiment"

showing 3 items of 3 documents

Whole-lake experiments reveal the fate of terrestrial particulate organic carbon in benthic food webs of shallow lakes

2014

Lake ecosystems are strongly linked to their terrestrial surroundings by material and energy fluxes across ecosystem boundaries. However, the contribution of terrestrial particulate organic carbon (tPOC) from annual leaf fall to lake food webs has not yet been adequately traced and quantified. In this study, we conducted whole-lake experiments to trace artificially added tPOC through the food webs of two shallow lakes of similar eutrophic status, but featuring alternative stable regimes (macrophyte rich vs. phytoplankton dominated). Lakes were divided with a curtain, and maize (Zea mays) leaves were added, as an isotopically distinct tPOC source, into one half of each lake. To estimate the …

Food ChainjärvikokeetZea maysomnivoriset kalatterrestrinen hiiliAllochthonyDissolved organic carbonPhytoplanktonstable isotope analysisAnimalsEcosystemterrestrial carbonEcology Evolution Behavior and SystematicsIsotope analysisvakaiden isotooppien analyysiCarbon IsotopesEcologyshallow lakesLake ecosystemFisheswhole-lake experimentFeeding BehaviorPlanktonInvertebratesFood webCarbonMacrophytePlant LeavesLakesomnivorous fishmatalat järvetBenthic zoneAlloktoniaEnvironmental scienceSeasons
researchProduct

Littoral contribution to whole-lake primary production in highly humic Lake Mekkojärvi

2013

Suurin osa koko järven perustuotantoa käsittelevistä tutkimusta on tehty oligotrofisissa tai eutrofisissa järvissä ja vähän on tutkittu dystrofisten järvien toimintaa. Tämän tutkimuksen tarkoitus oli selvittää litoraalivyöhykkeen perustuotannon osuutta koko järven perustuotannosta dystrofisessa Mekkojärvessä vuonna 2012. Mekkojärvessä on korkeat liuennen orgaanisen hiilen (DOC) ja humushappojen pitoisuudet ja näiden tuloksena erittäin matala valon tunkeutuvuus, suhteellisen matala ravinnepitoisuus ja suhteellisen korkea keskisyvyyden suhde maksimisyvyyteen. Mallit, jotka perustuvat edellä mainittuihin parametreihin, ennustavat pohjaleville vain 5 % osuutta kokonaisperus…

littoralperiphytonplanktonphytoplanktonwhole-lake experimentdystrophicDOCjärvetrantavyöhykkeetMekkojärvi
researchProduct

Terrestrial carbohydrates support freshwater zooplankton during phytoplankton deficiency

2016

Article

zooplankton0106 biological sciencesAQUATIC FOOD-WEBFood ChainLow proteinCarbohydratesFresh Water010603 evolutionary biology01 natural sciencesDaphniaZooplanktonArticleZooplanktonWHOLE-LAKE EXPERIMENTSFATTY-ACID-COMPOSITIONHERBIVOROUS ZOOPLANKTONSTABLE-ISOTOPESDissolved organic carbonBotanyPhytoplanktonAnimalsDISSOLVED ORGANIC-CARBONFatty acidsfreshwaterchemistry.chemical_classificationMultidisciplinaryLAND-USEbiology010604 marine biology & hydrobiologyFatty AcidsfungiTEMPERATE LAKESPlant litterbiology.organism_classificationALLOCHTHONOUS CARBON6. Clean waterLakesDaphniachemistryterrestrial carbohydrates1181 Ecology evolutionary biologyphytoplanktonta1181Freshwater ecologyCarbohydrate MetabolismSEASONAL SHIFTSDietary CarbohydratesPolyunsaturated fatty acidScientific Reports
researchProduct