<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Alvarez, Maruxa</style></author><author><style face="normal" font="default" size="100%">Pardo, Isabel</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Dynamics in the trophic structure of the macroinvertebrate community in a Mediterranean, temporary stream</style></title><secondary-title><style face="normal" font="default" size="100%">AQUATIC SCIENCES</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">detritus</style></keyword><keyword><style  face="normal" font="default" size="100%">flow</style></keyword><keyword><style  face="normal" font="default" size="100%">functional feeding group</style></keyword><keyword><style  face="normal" font="default" size="100%">Mediterranean stream</style></keyword><keyword><style  face="normal" font="default" size="100%">periphyton</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2009</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2009///</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">71</style></volume><pages><style face="normal" font="default" size="100%">202 - 213</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Studies on the ecology of resource availability and its relation to hydrological regime are essential for aiding the understanding of stream functioning. This paper assesses the intrinsic role of potential food resources and hydrological variables in determining the functional structure of the macroinvertebrate community in a temporary, spring-fed stream. Quantitative estimates of food resources and aquatic macroinvertebrates, together with estimates of the hydrological variables, were collected during an annual surficial flow period. Standing stocks of benthic organic matter were moderately high (annual mean of 157.7 g AFDM m(-2)) and remained relatively constant over time. Moreover, allochthonous material was dominated by coarse material, reflecting the high retention but slow decomposition rates of Holm oak leaves, the major constituent of allochthonous inputs. Mean levels of periphyton biomass were high and decreased over the flow period (annual mean of 17 mg chl a m(-2)). The functional structure of the benthic macroinvertebrate community varied little over the study period and was consistently dominated by grazers and collectors. Conversely, predators and shredders were poorly represented and increased over the flow period. These observations were attributed to the impoverished invertebrate community that frequently characterizes temporary streams and the poor food quality associated with sclerophyllous leaf inputs at the beginning of the flow period. The small amplitude in discharge during most of the annual flow period and the high temperatures that distinguish the Mediterranean climate might allow algal food to be always available for consumers. This result may explain why autochthonous material was the most important food resource controlling food web dynamics in the studied temporary stream.</style></abstract><issue><style face="normal" font="default" size="100%">2</style></issue><notes><style face="normal" font="default" size="100%">The following values have no corresponding Zotero field:&lt;br/&gt;pub-location: PICASSOPLATZ 4, BASEL, 4052, SWITZERLAND&lt;br/&gt;publisher: SPRINGER BASEL AG</style></notes></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Cohen, Yehezkel</style></author><author><style face="normal" font="default" size="100%">Cohen, Shabtai</style></author><author><style face="normal" font="default" size="100%">Cantuarias-Aviles, Tatiana</style></author><author><style face="normal" font="default" size="100%">Schiller, Gabriel</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Variations in the radial gradient of sap velocity in trunks of forest and fruit trees</style></title><secondary-title><style face="normal" font="default" size="100%">Plant and Soil</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">azimuthal variations</style></keyword><keyword><style  face="normal" font="default" size="100%">conductive</style></keyword><keyword><style  face="normal" font="default" size="100%">conductive sapwood</style></keyword><keyword><style  face="normal" font="default" size="100%">flow</style></keyword><keyword><style  face="normal" font="default" size="100%">method</style></keyword><keyword><style  face="normal" font="default" size="100%">radial distribution of volumetric</style></keyword><keyword><style  face="normal" font="default" size="100%">radial distribution of volumetric flow</style></keyword><keyword><style  face="normal" font="default" size="100%">sapwood</style></keyword><keyword><style  face="normal" font="default" size="100%">t max heat pulse</style></keyword><keyword><style  face="normal" font="default" size="100%">t max heat pulse method</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2007</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2007///</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.springerlink.com/index/10.1007/s11104-007-9351-0http://link.springer.com/10.1007/s11104-007-9351-0</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">305</style></volume><pages><style face="normal" font="default" size="100%">49 - 59</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">We studied the radial pattern of sap velocity (v) in trunks of six forest species: Cupressus sempervirens L; Eucalyptus camaldulensis F. Muell; Pinus halepensis Mill. (Alleppo pine); Quercus aegilops L. ssp. ithaburensis [Decne] Boiss; Quercus calliprinos Webb; Quercus rotundifolia Lam. (Syn. Quercus ilex spp. Rotundifolia) and three fruit species: Citrus sinensis L. Osback; Malus domestica cv. Golden Delicious; Persea americana Mill. Data was selected from measurements made over a period of 15 years. For each species, at least data of 1–2 weeks measured on days with clear sky and after a rain event or irrigation were analyzed. Measurements were made with the Tmax heat pulse method, and six points were measured along the radius of the trunk. Two types of radial pattern were found; in one type the highest v value was recorded near the cambium, decreasing toward the heartwood; and the other type had low v near the cambium increasing toward a depth of 12 to 20 mm below the cambium and decreasing with depth to the heartwood. There was large interspecies variability of v in both the pattern of radial gradient with depth and the distance between the cambium and the border of conducting sapwood. Variations in radial pattern of v between trees within species were generally small with a coefficient of variation of 4–20%. The mean fractions of volumetric flow in the 0–16 and 0–24 mm layers below the cambium were 59% and 79% of the total flow, respectively. The distance between the cambium and the border between conducting and non-conducting sapwood varied from 31 to 66 mm in the various species. The radial distribution of sap velocity with azimuth around the trunk had a coefficient of variation similar to that found between trees of the same species. The amplitude of the azimuthal variation changed during the day; it was high in the mornings and evenings and low at noon. The variation of sap velocity in three azimuths was more affected by the structure of each individual trunk than by the position with respect to the sun.</style></abstract><issue><style face="normal" font="default" size="100%">1-2</style></issue></record></records></xml>