Sexual selection in Japanese macaques II: female mate choice and male-male competition.

Soltis J, Mitsunaga F, Shimizu K, Nozakis M, Yanagihara Y, Domingo X, Takenaka O (1997) Sexual selection in Japanese macaques II: female mate choice and male-male competition. Animal Behaviour 54:737-746.

Sex linkage of minisatellite bands in Bobcats (Felis rufus).

Domingo-Roura X, Jacobson HA, Weaver RF (1997) Sex linkage of minisatellite bands in Bobcats (Felis rufus). Journal of Heredity 88:527-530.

Effect of root competition and shading on resprouting dynamics of Erica multiflora L.

Vilà M (1997) Effect of root competition and shading on resprouting dynamics of Erica multiflora L. Journal of Vegetation Science 8:71-80.

Hypervariable microsatellite loci in the Japanese Macaque (Macaca fuscata) conserved in related species.

Domingo-Roura X, López-Giráldez T, Shinohara M, Takenaka O (1997) Hypervariable microsatellite loci in the Japanese Macaque (Macaca fuscata) conserved in related species. American Journal of Primatology 43:357-360.

Falling or movement of seeds and the presence of an elaiosome: its effect on ant reaction (Hymenoptera, Formicidae) in a myrmecochorous species, Euphorbia characias (Euphorbiaceae).

Espadaler, X, Gómez C (1997) Falling or movement of seeds and the presence of an elaiosome: its effect on ant reaction (Hymenoptera, Formicidae) in a myrmecochorous species, Euphorbia characias (Euphorbiaceae). Sociobiology 30:175-183.

Mineralogical composition of African dust delivered by red rains over northeastern Spain.

Avila A, Queralt-Mitjans I, Alarcón M (1997) Mineralogical composition of African dust delivered by red rains over northeastern Spain. Journal of Geophysical Research 102, No.D18:21977-21996.

Trascolación y escorrentía cortical en dos encinares (Quercus ilex L.) del macizo del Montseny (Barcelona).

Rodrigo A, Avila A (1997) Trascolación y escorrentía cortical en dos encinares (Quercus ilex L.) del macizo del Montseny (Barcelona). Irati 97, Montes del futuro respuesta ante un mundo en cambio. Mesas I y II, pp. 550.

Flowering phenology, floral traits and pollinator composition in a herbaceous Mediterranean plant community

Bosch J., Retana J., Cerdá X. (1997) Flowering phenology, floral traits and pollinator composition in a herbaceous Mediterranean plant community. Oecologia. 109: 583-591.
Enllaç
Doi: 10.1007/s004420050120

Resum:

The relationships between flowering plants and their insect visitors were studied in a Mediterranean grassland in north-east Spain. Floral traits (size, shape, symmetry, and colour), floral rewards (pollen and nectar), flowering period, and floral visitors were recorded for the 17 most abundant plants in the community. Flowering was year-round, but most species flowered in spring. The three species that flowered after spring had small flowers, but the distribution of floral features (including rewards offered) did not show a strong seasonality. Ants contributed 58.5% to the flower visits recorded. Other frequent visitors were beetles (12%), flies (9.5%), honey bees (6.4%), wild bees (6.4%), and wasps (5.2%). Honey bees were most abundant in April, wild bees from April to July, beetles from May to July, and ants from May to September. The lack of tight plant-insect associations was the rule, with most plant species visited by a rather diverse array of insects representing two or more orders. The plant species having narrower spectra of visitors either had flower rewards exposed or attracted mostly illegitimate visitors. By means of correspondence analysis four categories of plants were defined according to their main groups of visitors: (1) honey bees and large wild bees: (2) large wild bees; (3) ants and beetles; and (4) beetles and small-sized bees. The Mantel test was used to calculate correlations among four matrices representing similarities in visitors attracted, floral morphological traits, pollen-nectar rewards, and blooming time, respectively. In spite of seasonality shown by the different insect groups, results indicate that the observed patterns of visitor distribution among plants were most affected by pollen-nectar rewards.

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Clearing of vegetation in Mediterranean garrigue: response after a wildfire.

Lloret F, Vilà M (1997) Clearing of vegetation in Mediterranean garrigue: response after a wildfire. Forest Ecology and Management 93:227-234.

Effects of prolonged drought stress and nitrogen deficiency on the respiratory O2 uptake of bean and pepper leaves

González-Meler M.A., Matamala R., Peñuelas J. (1997) Effects of prolonged drought stress and nitrogen deficiency on the respiratory O2 uptake of bean and pepper leaves. Photosynthetica. 34: 505-512.
Enllaç
Doi: 10.1023/A:1006801210502

Resum:

We analyzed the combined effects of mild drought stress and severe nitrogen (N) deprivation on respiration of acclimated mature leaves of beans (Phaseolus vulgaris L. cv. Garrofal) and peppers (Capsicum annuum L., pure line B6). Rates of oxygen uptake were measured polarographically, and inhibitors were added to the closed cuvette to compare the effects of environmental stress on the cytochrome (cyt) and alternative pathways of mitochondrial respiration. Dark oxygen uptake was decreased by the water deficit treatment in both plants, and in the case of N limitation leaf respiration rates (R(D)) of peppers were also reduced. R(D) of leaves of beans and peppers grown under N-limiting conditions did not follow the decrease, in leaf N concentration, since R(D) expressed per unit of tissue N was considerably higher in the N-stressed leaves. Values obtained with specific inhibitors of the two terminal oxidases of mitochondrial respirations suggested that the cyt pathway of respiration was affected by mild drought and severe N stress. When plants were exposed to both environmental stresses, leaf respiration response was similar to that under N limitation, in this case the most severe stress.

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