Phytoplankton indirectly influence climate through their role in the ocean biological carbon pump. In Southern Ocean, subantarctic zone represents an important sink, yet variables limiting phytoplankton growth are not fully constrained. Using three shipboard bioassay experiments on separate voyages, we evaluated seasonality of iron (Fe) and manganese (Mn) co-limitation south Tasmania, Australia...

Knowledge of seasonal maximum potential growth rates are important for assessing periods of resource limitations in fruit tree species. In this study we assessed the periods of resource limitation for vegetative (current year stems, and woody biomass) and reproductive (fruit) organs of a major agricultural crop: the apple tree. This was done by comparing relative growth rates (RGRs) of individu...

The pattern of senescence was studied by following the changes in chlorophyll and protein in the leaves and by measuring (32)P retention and export from source to sink during development of the rice plant (Oryza sativa L. cv. Jaya) subjected to different manipulative treatments. With the advance of reproductive development, the chronological sequence of leaf senescence was changed, so that the ...

a sensor network is made up of a large number of sensors with limited energy. sensors collect environmental data then send them to the sink. energy efficiency and thereby increasing the lifetime of sensor networks is important. direct transfer of the data from each node to the central station will increase energy consumption. previous research has shown that the organization of nodes in cluster...

Šupraha, L. 2016. Phenotypic evolution and adaptive strategies in marine phytoplankton (Coccolithophores). Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology 1427. 54 pp. Uppsala: Acta Universitatis Upsaliensis. ISBN 978-91-554-9689-0. Coccolithophores are biogeochemically important marine algae that interact with the carbon cycle through photosy...

Microbial respiration depends on microclimatic variables and carbon (C) substrate availability, all of which are altered when ecosystems experience major disturbance. Widespread tree mortality, currently affecting piñon–juniper ecosystems in southwestern North America, may affect C substrate availability in several ways, for example, via litterfall pulses and loss of root exudation. To determin...

Reduction in enteric methane (CH4) emissions from cattle can be achieved through use of feed additives, which often results increased emission hydrogen (H2). The objective this study was to investigate vitro effects a known sink, fumaric acid, combination with either 2 inhibitors, the macroalga Asparagopsis taxiformis or nitrate, on CH4 and H2 production, degradability, pH, redox potential. A c...

Energy and water availability were identified as the first order controls of evapotranspiration(ET) in ecohyrodrology. With a ~1,000 km precipitation gradient and distinct wet-dry climate,the North Australian Tropical Transect (NATT) was well suited for evaluating how energy andwater availabilities constrain water use by vegetation, but has not been done yet. In this study,we addressed this que...