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171.
Seven stations were sampled along a transect between Imperia and Cape Corso during the C.N.R. “Bannock” survey (8-10 October 1984).
The TSM, PC, PN, and chlorophyll-a concentrations are low and decrease with depth. The AOU values suggest that below 400 m the organic matter is completely inert to further oxidation. Heavy metals concentrations show marked differences in the surface water layer between coastal and offshore stations. The chemical characteristics of total suspended matter are more conservative as an index of waters of coastal origin than the quantity of particulate matter itself or metal concentrations. The Fe: Cd ratio in particles is of interest as an indicator of coastal waters. 相似文献
The TSM, PC, PN, and chlorophyll-a concentrations are low and decrease with depth. The AOU values suggest that below 400 m the organic matter is completely inert to further oxidation. Heavy metals concentrations show marked differences in the surface water layer between coastal and offshore stations. The chemical characteristics of total suspended matter are more conservative as an index of waters of coastal origin than the quantity of particulate matter itself or metal concentrations. The Fe: Cd ratio in particles is of interest as an indicator of coastal waters. 相似文献
172.
Stefano Colazza Mauro Lo Bue Daniela Lo Giudice Ezio Peri 《Die Naturwissenschaften》2009,96(8):975-981
Chemical footprints left behind by true bugs are perceived as contact kairomones by scelionid egg parasitoids. Female wasps
encountering a contaminated artificial substrate display a characteristic arrestment posture, holding the body motionless
and antennating the surface. In the system Nezara viridula (L.) and its egg parasitoid Trissolcus basalis (Wollaston), previous studies have shown that the kairomone mediating such behavior is part of N. viridula’s cuticular hydrocarbons (CHC) and furthermore that the wasp’s ability to discriminate host male and female footprints is mainly
based on the presence/absence of nonadecane (nC19). In this study, the effect of epicuticular waxes of leaves of broad bean, Vicia faba, on wasp responses to footprints of N. viridula females were investigated. Approximately 20% of T. basalis females displayed an arrestment posture when released on the adaxial leaf surfaces of broad bean plants with intact wax layer
and without host chemical contamination; whereas ∼70% of wasps displayed the arrestment posture when intact leaves were contaminated
by host female footprints. Adaxial leaf surfaces of broad bean plants dewaxed with an aqueous solution of gum arabic and afterwards
contaminated by N. viridula females induced arrestment responses in about 10% of female wasps; the same percentage of arrestment (10%) was observed when
the wasps were released on leaves contaminated by host females and subsequently dewaxed. The side of the polymer film that
was appressed to the leaf surface, peeled from the contaminated leaves, induced an arrestment posture in about 95% of observed
wasps. Scanning electron microscopy (SEM) revealed that the epicuticular waxes occurred as a film densely crystallized as
irregularly shaped platelets with spherical granules randomly distributed. These findings demonstrated that epicuticular waxes
of broad bean leaves can mediate the foraging behavior of T. basalis females by absorbing contact kairomones of the host. 相似文献
173.
Bastiancich Leone Lasagna Manuela Mancini Susanna Falco Mauro De Luca Domenico Antonio 《Environmental geochemistry and health》2022,44(7):1971-1994
Environmental Geochemistry and Health - In the context of global climate change, understanding the relationships between climate and groundwater is increasingly important. This study in the NW Alps... 相似文献
174.
D’Amico Sebastiano Comite Valeria Paladini Giuseppe Ricca Michela Colica Emanuele Galone Luciano Guido Sante Mantella Giuseppe Crupi Vincenza Majolino Domenico Fermo Paola La Russa Mauro Francesco Randazzo Luciana Venuti Valentina 《Environmental science and pollution research international》2022,29(20):29478-29497
Environmental Science and Pollution Research - In this study, a multimethodological analysis involving optical and physical/chemical diagnostic techniques and 3D photogrammetric survey was... 相似文献
175.
Fermo Paola Comite Valeria La Russa Mauro Francesco 《Environmental science and pollution research international》2022,29(20):29382-29384
Environmental Science and Pollution Research - 相似文献