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71.
M. Fernanda Alvarez Hernán H. Benítez J. Camilo Villegas Cortés Néstor A. Gabellone M. Cristina Claps 《Chemistry and Ecology》2016,32(8):742-755
Polyphenols – products of organic-matter decomposition entering water bodies from autochthonous and especially allochthonous sources – affect primary producers, bacterioplankton, and zooplankton to consequently modify food webs. Cladocerans are widely used in research experiments because they constitute the most frequent prey of high-trophic-level organisms in the majority of lakes, and certain species symbolise the ecologic prototype of the generalist filter feeder. In our study area’s shallow lakes, cladocerans, though generally of low abundance, do attain significantly high biomasses. We accordingly evaluated the mortality of the cladoceran Daphnia menucoensis Paggi, 1996 exposed to different tannin concentrations along with the bacterial abundance. In two experiments D. menucoensis females exposed to high tannin concentrations reproduced inefficiently, exhibited high mortality, and manifested altered behaviour, such as reduced reflexes and diminished mobility. Though tannins apparently affected algal abundances, the cladoceran herbivory strongly reduced those numbers. Positive effects on bacteria, however, were not recorded. High-allochthonous-organic-matter-containing water bodies support trophic webs because bacterioplankton provide an alternative energetic base for the zooplankton, as possibly occurs in shallow lakes of the Salado-River basin, characterised by cyclic hydrologic periods alternating between draught and flooding and intensive land use. In conclusion, tannins diminish D. menucoensis’s survival, locomotion, and the capacity to respond to stimuli. 相似文献
72.
Edison Barbieri Elisangela de Andrade Passos Alexandre Filippini Izaias Souza dos Santos Carlos Alexandre Borges Garcia 《Environmental monitoring and assessment》2010,169(1-4):631-638
Cd, Co, Cr, Cu, Mn, Ni, Zn, and Pb were measured in feather samples of adult, subadult, and juvenile of Larus dominicanus, sampled in the Florianólis, SC, in the south of Brazil in December 2005, by flame atomic absorption spectrophotometry. The average of the distribution of Cd concentration in adult feathers (0.072 μg g???1) was significantly different than that found in juvenile feathers (0.021 μg g???1). Cu concentration averages were not significantly different between adults (13.30 μg g???1), subadults (9.67 μg g???1), and juveniles (13.76 μg g???1). For adults and juveniles there was significant difference in feather concentrations for Cd, Co, Cr, Ni, and Pb. The distribution of Mn concentration averages in feathers differs between adults (11.36 μg g???1) and juveniles (1.184 μg g???1). Ni concentration averages of adults (5.92 μg g???1) were significantly higher than those of juveniles (2.23 μg g???1). For Pb, concentration averages were significantly higher in adults (7.53 μg g???1) than in juveniles (1.47 μg g???1). The concentration of Co and Cr in juvenile and subadults are statistically different when compared with the adults. In the present study, levels of Cd, Co, Cr, Mn, Ni, Zn, and Pb increased with age. The concentrations of essential trace elements in L. dominicanus were generally comparable to values reported in other studies. With non-essential metals (Cd, Pb, and Ni), in our study, L. dominicanus had lower values than those reported for their northern Atlantic counterparts. 相似文献
73.
Luciana Möller Fernanda Pedone Valdez Simon Allen Kerstin Bilgmann Shannon Corrigan Luciano B. Beheregaray 《Marine Biology》2011,158(1):113-126
Oceanographic processes play a significant role in shaping the genetic structure of marine populations, but it is less clear
whether they affect genetic differentiation of highly mobile vertebrates. We used microsatellite markers and mtDNA control
region sequences to investigate the spatial genetic structure of short-beaked common dolphins (Delphinus delphis) in southeastern Australia, a region characterised by complex oceanographic conditions associated with the East Australian
Current (EAC). A total of 115 biopsy samples of dolphins were collected from six localities spanning approximately 1,000 km
of the New South Wales (NSW) coastline. We found evidence for contrasting genetic diversity and fine-scale genetic structure,
characterised by three genetically differentiated populations with varying levels of admixture. Spatial genetic structure
was not explained by a model of isolation by distance, instead it coincides with main patterns of oceanographic variation
along the EAC. We propose that common dolphins along the EAC may be adapted to three water masses recently characterised in
this region. 相似文献
74.
Muñoz-Morales Martín Castañeda-Juárez Montse Souza Fernanda Lourdes Saez Cristina Cañizares Pablo Martínez-Miranda Verónica Linares-Hernández Ivonne Rodrigo Manuel Andrés 《Environmental science and pollution research international》2021,28(19):23657-23666
Environmental Science and Pollution Research - This work focuses on the development of electro-absorption and photoelectro-absorption technologies to treat gases produced by a synthetic waste... 相似文献
75.
Rodrigues Mesquita Tayane Cristiele Pereira Rosa André de Oliveira Santos Thales Felício Carraro Borges Alisson Calijuri Maria Lúcia de Paula Souza Francianny Maria 《Environmental science and pollution research international》2021,28(36):50001-50016
Environmental Science and Pollution Research - To investigate the feasibility of implementing decentralized sewage treatment systems aiming to meet environmental standards, the performance of three... 相似文献
76.
Rodrigues Pinto Beatriz Linares Jose Joaquin de Vasconcelos Lanza Marcos Roberto de Lourdes Souza Fernanda 《Environmental science and pollution research international》2021,28(21):26762-26771
Environmental Science and Pollution Research - This paper reports the development of a novel photoelectrochemical (PEC) oxidation technique based on UV-C irradiation and boron-doped diamond (BDD)... 相似文献
77.
78.
Hoelscher Fernanda Cardoso Priscilla B. Candiotto Graziâni Guindani Camila Feuser Paulo Araújo Pedro H. H. Sayer Claudia 《Journal of Polymers and the Environment》2021,29(11):3668-3678
Journal of Polymers and the Environment - Biodegradability is a key feature for the application of polymeric devices in medicine. This study reports an experimental and theoretical study of the... 相似文献
79.
de Oliveira Ana Carolina Salgado Ferreira Laura Fonseca de Oliveira Begali Danielly Ugucioni Julio Cesar de Sena Neto Alfredo Rodrigues Yoshida Maria Irene Borges Soraia Vilela 《Journal of Polymers and the Environment》2021,29(8):2546-2556
Journal of Polymers and the Environment - Researches for the development of materials with less environmental impact have been more common. Pectin is a natural polysaccharide, presenting in plants... 相似文献
80.
Pavão Diogo C. Porteiro João Ventura Maria A. Borges Silva Lurdes Medeiros António Moniz Ana Moura Mónica Moreira Francisco Silva Luís 《Environment, Development and Sustainability》2021,23(11):16504-16528
Environment, Development and Sustainability - Tourists have become increasingly interested in certain aspects of their destination, including landscape and biodiversity elements, thereby promoting... 相似文献