Search

Start Over Coverage 297-300

3. Oswaldocruzia venezuelensis sp. n. (Nematoda: Trichostrongylina, Molineoidea), a parasite of Bufo marinus from Venezuela

Creator:
Slimane, Badreddine Ben, Gurrero, R., and Durette-Desset, Marie-Claude
Format:
print
Type:
model:internalpart and TEXT
Subject:
Oswaldocruzia venezuelensis sp. n., Nematoda, Trichostrongylina, Bufonidae, and Venezuela
Language:
English
Description:
A new species of Oswaldocruzia Travassos, 1917, a parasite of Bufo marinus L. from Venezuela, is described. Like most Neotropical Oswaldocruzia, Oswaldocruzia venezuelensis sp. n. is characterized by spicules with three principal branches: blade, shoe and fork, and by a division of the fork within the distal third of the spicule length. O. vuucheri Ben Slimane et Durette-Desset, 1993 is the most closely related species due to its caudal bursa of type II and its cervical alae of the same shape but it differs in the following characters: the position of the papillae of rays 4 situated nearer the papillae of rays 3 rather than rays 5, a higher percentage of the ridges in the oesophageal region, the cervical alae three times longer and sharp and the spicular fork divided less deeply.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

4. Plasticity in physiology and growth of Salix matsudana in response to simulated atmospheric temperature rise in the Mu Us Sandland

Creator:
He, W.-M. and Dong, M.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
canopy productivity index, growth and allocation, leaf turnover, maximum quantum yield, net photosynthetic rate, physiological acclimation, substomatal and atmosphere CO2 concentration, transpiration rate, and water use efficiency
Language:
Multiple languages
Description:
In a controlled experiment, Salix matsudana cuttings were subjected to three atmospheric temperatures (i.e. control, 0.5 and 1.0 °C above the control, respectively) to explore their short-term plastic responses to simulated atmospheric temperature rise. Warming affected significantly net photosynthetic and transpiration rates, but had no significant impacts on water use efficiency, ratio of sub-stomatal to atmospheric CO2 concentration, maximum quantum yield, water saturation deficit, tissue density, and water loss. Leaf natality and leaf mortality were affected significantly by increasing atmospheric temperature. Total plant biomass, leaf mass ratio, root mass ratio, and canopy productivity index exhibited significant responses to the warming treatments, but obvious differences in the changing details did appear among the four traits. Hence: (1) S. matsudana cuttings were sensitive to small-range atmospheric temperature increases such as 0.5-1.0 °C, which can alter growth and allocation through modifying photosynthetic rate and leaf turnover. (2) Short-term physiological acclimation did not occur in young individuals of S. matsudana. (3) The warming depressed growth of young individuals of S. matsudana to various extents. and W. M. He, M. Dong.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public