This radical recasting of the concept of species
in general and of humans in particular has now achieved the status of dogma, at least in the scientific community.
The not-yet-named butterflies in the Lycaeides genus, however, flourish in the harsh zone above the timberline, where the parent species
can't cope, Gompert and his colleagues say.
The idea is that known occurrences of species
across landscapes can be related to raster geographic information system coverages summarizing environmental variation across those landscapes to develop a quantitative picture of the ecologic distribution of the species
So far, Fisher has discovered 800 previously unknown ant species
A law called the Endangered Species
Act (ESA) also helped.
This was the first sighting of the male of the species
This approach pioneered by Ludvigsen in the 1970s, and rests on the assumption that all species
of each genus would have had the same ecological requirements, more or less.
Three rubber-producing species
of higher plant were chosen from different Super Orders of the Dicotyledoneae to reflect as distant a phylogenetic relationship as possible.
"It is going to take a long, long time before the natural forests in Ontario will be replaced by more southerly located species
Robinson's Kokias, however, flowered prolifically producing hundreds of viable seeds, which he germinated and used to begin growing another crop of the rare species
"We just thought it fit the Endangered Species
Act as well as some of the other species
that have been listed," Gardner says.
This potential sixth great extinction is unique in that it will have been caused largely by the activities of a single species
. It is the first mass extinction that humans will witness firsthand--and not just as innocent bystanders.
The first human colonizers found 140 native breeding bird species
in Hawaii, many of them found nowhere else, but half of them are now extinct.
* Native tree species
(also called indigenous) are wild and grew naturally or spontaneously in the undisturbed forest vegetation before the arrival of Columbus or other Europeans.