Urochloa in Tropical Agroecosystems

Tropical and Subtropical Agroecosystems

Tropical and Subtropical Agroecosystems

Tropical and Subtropical Agroecosystems

SUMMARY Thyroid hormones and their receptors in the ovaries are active regulators of reproductive function; both hyper-and hypo-thyroidism may result in estrous cycle disturbances. In addition, thyroid hormones elicit an extraordinary multiplicity of biochemical, cellular, and physiological responses, both in the simplest and the most complex organisms. On the other hand, glutamate, the main ex...

Biodiversity conservation in tropical agroecosystems: a new conservation paradigm.

It is almost certainly the case that many populations have always existed as metapopulations, leading to the conclusion that local extinctions are common and normally balanced by migrations. This conclusion has major consequences for biodiversity conservation in fragmented tropical forests and the agricultural matrices in which they are embedded. Here we make the argument that the conservation ...

Landscape constraints on functional diversity of birds and insects in tropical agroecosystems.

In this paper, we analyze databases [corrected] on birds and insects to assess patterns of functional diversity in human-dominated landscapes in the tropics. A perspective from developed landscapes is essential for understanding remnant natural ecosystems, because most species experience their surroundings at spatial scales beyond the plot level, and spillover between natural and managed ecosys...