Search results for "49"

Tidsanalyse av bentisk bløtbunnsfauna i Kristiansandsfjorden : Har det forekommet endringer i bløtbunnsfauna fra 1983 til 2016?

2017

Masteroppgave akvatisk økologi BIO500 - Universitetet i Agder 2017 Kristiansandsfjorden har i en årrekke vært utsatt for sterk belastning forårsaket av menneskelige aktiviteter. Hovedproblemene i fjorden har vært knyttet til høye konsentrasjoner av organisk materiale, klororganiske forbindelser, PAH og tungmetaller, som hovedsakelig har sin kilde fra utslipp av kommunalt avløpsvann og industriutslipp. Det har blitt iverksatt ulike tiltak i fjorden: utslippsreduksjoner for industri, bygging av kommunale renseanlegg og tildekking av forurenset sediment. Disse tiltakene har ført til en bedring av miljøtilstanden, men den har fortsatt ikke nådd miljømålet satt av Vannforskriften. Det har blitt …

Kvalitativ og kvantitativ inventering av fiskesamfunnet i Ytre Oslofjord : En beskrivelse av diversitet og generelle trekk ved fiskesamfunnet i Færde…

2020

Master's thesis in Coastal ecology (BIO501) A three-year study was performed annually from 2017 to 2019 in Færder- and Ytre Hvaler national parks located in outer Oslofjord. Data collection was conducted in shallow- and deep water habitats using catch-based methodologies in 2017 - 2019 (eel fyke net and trap) and visual methodology (stereo-video)in 2019. In the period of study, a total of 9733 individual fish were recorded among 37 species from 19 families. Shallow water fish assemblage (1 - 10 m) sampled by fyke net was dominated by a selection of wrasses (goldsinny wrasse and corkwing wrasse) and small, stationary species of non-commercial importance. Sampled by trap at deeper habitats (1…

Effects of simulated environmental changes on growth and growth form in a late snowbed population of pohlia wahlenbergii (Web. et Mohr) Andr

2003

In a factorial field experiment we increased the temperature (Open Top Chambers) and nutrients (nitrogen, phosphorus, and potassium [NPK]) to simulate predicted future climate changes and studied the growth response of the acrocarpous bryophyte Pohlia wahlenbergii (Bryaceae) in a wet snowbed environment. The species shows a positive growth-length response to added nutrients and increased temperature. The stronger response to nutrients indicates a strong limitation of nutrients in the snowbed environment. There was an immediate response to nutrient treatment, whereas the temperature response was delayed. The growth response shows a clear interaction between temperature and nutrients. The imm…

Experimental warming had little effect on carbon-based secondary compounds, carbon and nitrogen in selected alpine plants and lichens

2011

Accepted version of an article published in the journal: Environmental and Experimental Botany. Published version available on Science Direct: http://dx.doi.org/10.1016/j.envexpbot.2011.04.011 Global warming is expected to change plant defence through its influence on plant primary resources. Increased temperature (T) will increase photosynthesis, and thus carbon (C) availability, but may also increase soil mineralization and availability of nitrogen (N). More access to C and N is expected to mainly increase plant growth, and, according to hypotheses on resource based defence, this could lower plant concentrations of carbon-based secondary compounds (CBSCs). We used two already established …

Quantitative importance of staminodes for female reproductive success inParnassia palustrisunder contrasting environmental conditions

2003

The five sterile stamens, or staminodes, in Parnassia palustris act both as false and as true nectaries. They attract pollinators with their conspicuous, but non-rewarding tips, and also produce nectar at the base. We removed staminodes experimentally and compared pollinator visitation rate and duration and seed set in flowers with and without staminodes in two different populations. We also examined the relative importance of the staminode size to other plant traits. Finally, we bagged, emasculated, and supplementary cross-pollinated flowers to determine the pollination strategy and whether reproduction was limited by pollen availability. Flowers in both populations were highly dependent o…

Regional climate model simulations for Europe at 6 and 0.2 k BP: sensitivity to changes in anthropogenic deforestation

2014

International audience; This study aims to evaluate the direct effects of anthropogenic deforestation on simulated climate at two contrasting periods in the Holocene, ∼ 6 and ∼ 0.2 k BP in Eu-rope. We apply the Rossby Centre regional climate model RCA3, a regional climate model with 50 km spatial resolution, for both time periods, considering three alternative descriptions of the past vegetation: (i) potential natural vegetation (V) simulated by the dynamic vegetation model LPJ-GUESS, (ii) potential vegetation with anthro-pogenic land use (deforestation) from the HYDE3.1 (History Database of the Global Environment) scenario (V + H3.1), and (iii) potential vegetation with anthropogenic land …

Jauno vēsturnieku zinātniskie lasījumi, 1

2016

Mapping and assessing ecosystem services in the EU:Lessons learned from the ESMERALDA approach of integration

2018

The European Union (EU) Horizon 2020 Coordination and Support Action ESMERALDA aimed at developing guidance and a flexible methodology for Mapping and Assessment of Ecosystems and their Services (MAES) to support the EU member states in the implementation of the EU Biodiversity Strategy's Target 2 Action 5. ESMERALDA's key tasks included network creation, stakeholder engagement, enhancing ecosystem services mapping and assessment methods across various spatial scales and value domains, work in case studies and support of EU member states in MAES implementation. Thus ESMERALDA aimed at integrating various project outcomes around four major strands: i) Networking, ii) Policy, iii) Research an…

Libri Quator De Antiquitatibus Lusitaniae

Sig. [creu grega]4, A-R8, [creu grega]-4[creu grega]2, A-C8, [signe]10. - Inclou: Vita L. Andreae Resendii / Autore Iacobo Menoetio Vasconcello i Vita Iacobi Moenetii Vasconcelli / ab ipso conscripta Capitals grav., filets, frisos

Synthesis of Combretastatin A-4 and 3′-Aminocombretastatin A-4 derivatives with Aminoacid Containing Pendants and Study of their Interaction with Tub…

2020

Natural product combretastatin A-4 (CA-4) and its nitrogenated analogue 3&prime