Traditional ecological theory has stressed the importance of competitive interactions in
regukting species richness. Recent research has transcended this viewpoint by considering the …

(1) Six measures of beta diversity (five from the literature, one proposed here) were
compared and evaluated. Application was limited to measures suited for species presence-absence …

We consider four categories or biological mechanisms of determinants which cause and
maintain species diversity: niche relations, habitat diversity, mass effects and ecological …

In the context of a simple mathematical model, we derive several mechanisms whereby plant
species can coexist in a community without differing in their trophic niches (their relations …

The rarity of long-range seed dispersal (telechory) and commonness of antitelechory in
desert plants are examined in light of contemporary mathematical theories of the evolution of …

The dynamics of vegetative and reproductive growth were compared in matched pairs of
Mediteranean and desert populations of three unrelated annual species, Erucaria hispanica (L.…

Based on the measurements of 1063 flower reflection spectra, we show that flower colours
fall into distinct clusters in the colour space of a bee. It is demonstrated that this clustering is …

Can species richness and rarity be predicted from space? If satellite‐derived vegetation indices
can provide us with accurate predictions of richness and rarity in an area, they can serve …

Anemone coronaria, Papaver rhoeas, Ranunculus asiaticus , and Tulipa agenensis are
pollinated primarily by scarabaeid beetles ( Amphicoma , Glaphyridae) and secondarily by bees …

Bombus terrestris invaded Mt Carmel about two decades ago and since then has shown a
constant expansion. Observations on bee visits to Arbutus andrachne (1980–1994) and …