Encontrados 6 documentos, a visualizar página 1 de 1
Biophysical probing of Spartina maritima photo-system II changes during prolong...
Duarte, B.; Santos, B.; Marques, J. C.; Caçador, I.Submergence is one of the major constrains affecting wetland plants, with inevitable impacts on their physiology and productivity. Global warming as a driving force of sea level rise, tend to increase the submersion periods duration. Photosynthesis biophysical probing arise as an important tool to understand the energetics underlying plant feedback to these constrains. As in previous studies with Spartina marit...
Tagus estuary salt marshes feedback to sea level rise over a 40-year period: In...
Duarte, B.; Caçador, I.; Marques, J. C.; Croudace, I. W.Sea level rise (SLR) has been evaluated using data acquired from two Tagus estuary salt marshes. Sediment accumulation rates over a 40-year study period were determined using 137Cs along with an evaluation of several geochemical indices and ratios as proxies of the mechisms underlying these SAR variations. Correlating SLR data from 1963 to 2001 with the sediment accretion rates (SARs) an inverse pattern of inte...
Abiotic modulation of Spartina maritima photobiology in different latitudinal p...
Duarte, B.; Couto, Thiago; Freitas, J.; Valentim, J.; Silva, H.; Marques, J. C.; Dias, J. M.; Caçador, I.Spartina maritima has a very wide distribution in the northern hemisphere salt marshes crossing a wide variety of climatic environments. Therefore, it is not strange that some differences arise when observing the photosynthetic mechanisms of different populations inhabiting different latitudes. During this study it could be observed that climate is the most important factor controlling the photosynthetic traits...
Halophytes as sources of metals in estuarine systems with low levels of contami...
Couto, Thiago; Duarte, Bernardo; Barroso, Dimitri; Caçador, I.; Marques, J. C.Heavy metal concentrations present in the above- and beowground tissues of Scirpus maritimus L., Spartina maritima (Curtis) Fernald and Zostera noltii Hornem were analysed seasonally in the Mondego Estuary, Portugal. The sediments of the estuary were confirmed to contain only low concentrations of heavy metals. The belowground tissues of all three species showed higher heavy metal concentrations than the aboveg...
Mercury mobility in a salt marsh colonised by Halimione portulacoides
Válega, M.; Lillebø, A. I.; Caçador, I.; Pereira, M. E.; Duarte, A. C.; Pardal, M. A.The present study intends to increase the knowledge on the mobility of mercury in a salt marsh colonised by Halimione portulacoides. Mercury distribution in the sediment layers and its incorporation into the plant biomass were assessed, as well as the potential export of mercury from the contaminated area to the adjacent environment. Mercury pools in the sediments ranged from 560 to 943 mg m-2 and are largely a...
Mercury in salt marshes ecosystems: Halimione portulacoides as biomonitor
Válega, M.; Lillebø, A. I.; Pereira, M. E.; Caçador, I.; Duarte, A. C.; Pardal, M. A.http://www.sciencedirect.com/science/article/B6V74-4TFV904-1/2/e4e4acaa50b773a40436188282a1f9e9
| Financiadores do RCAAP | |||||||
|
|
|
|
|
|
||