The DPSIR approach consists in constructing a single socio-environmental model to address a specific problem in water management, while paying no attention to the existence of conflicts surrounding the definition of the issue at hand, the social, political and spatial delimitation of that issue, and the translation of stakes in terms of quantitative variables.
Our results also highlight issues with delimitation of species in Hemibrycon.
Species delimitation is an important issue in medicinal fungi, because the production of bioactive secondary metabolites is first species-specific, and then depending on strain characteristics.
Species delimitation is an old issue in biology that continues to attract considerable attention [ 1- 3] as the present global biodiversity crisis makes it of paramount importance to delineate and identify as objectively as possible species-level taxa [ 4].
(The distinction between type I and type II errors depends on the delimitation of the effect under study. In discussions of risk, this delimitation is mostly uncontroversial).
Gao et al. (2008) addressed this issue of species delimitation in Hedychium with one of the first molecular phylogenetic analyses, comparing 22 accessions with SRAP markers.
The problems arising for Spirogyra from findings without ripe hypnozygotes and the low success rate in inducing conjugation [ 9- 13] call for other ways of addressing the issue of species delimitation and identification.
Toward the contemporary tips of a phylogenetic tree, resolution is subject to the delimitation of species, a complex and often arbitrary issue that is not part of the phylogenetic inference process; eventually, recognizing the distinctiveness of individual taxa becomes problematic, because recent and incipient speciation may be difficult to identify [17], [41].
Species delimitation is emerging as a major topic in current systematics [1], [2].
Despite a conservative delimitation strategy, carychiid morphospecies comprise a great number of unrecognized evolutionary lineages.
