The phenomenon of trash has rarely been addressed in the cultural theoretical literature. However, its structural similarity with the concept of taboo as well as its role in the dynamics of culture has been stated. Current paper aims to summarize the partial contributions that have been made so far, localize them in a larger semiotic framework, and deriving from Lonnan's approach to culture suggest a few further ideas for a semiotic definition of trash. It is proposed to define trash as a phenomenon marking the boundary between culhlre and non-culture/nature. In the context of the deepening environmental crisis (to which accumulation of trash contributes) a semiotic approach opens a new perspective for identifying the origin of the problem in our mind/culture rather than in nature.

Inspired by a mathematical ecology of thearre (M. Dinu) and the eco-grammar systems (E. Csuhaj-Varju et al.), this paper gives a brief analysis of simple cellular automata games in order to demonstrate their primary semiotic features. In particular, the behaviour of configurations in Conway's game of life is compared to several general features of Uexküll's concept of Umwelt. It is concluded that ecological processes have a fundamental semiotic dimension.

The paper places the trendy notion of virtuality and virtual reality in a conceptual and historical context that makes it useful in a semiotic perspective. Virtuality is connected with the classical notion of fictionality, in its meaning of both invention and deception. Historically an active, a passive, and a neutral version of the concept can be distinguished. The notion is reinterpreted as a variant of the semiotic processes of deixis. In relation to nature - scenarios, prognoses, hypotheses, etc. - virtuality is seen as a means of anchoring the human subject in nature instead of constructing a nonreal universe separated from it.

The increasing problem of bioinvasion (the mixing up of natural species characterising the planet's local ecosystems due to globalisation) is investigated as an example of an ecosemiotic problematic. One concern is the scarcity of scientific knowledge about long term ecological and evolutionary consequences of invading species. It is argued that a natural science conception of the ecology of bioinvasion should be supplemented with an ecosemiotic understanding of the significance of these problems in relation to human culture, the question of cultural diversity, and what it means to be indigenous or foreign. Bioinvasion, extinction of native species, and overall decrease in biodiversity, may go along with decreased cultural diversity; as when the loss of local agricultural traditions lead to genetic erosion. There are possible ecosemiotic parallels between language extinction and species extinction, both being related to globalisation. It is argued that the case of bioinvasion reveals the existence of two kinds of ecosemiotic contingency, (1) evolutionary openended and partly random generation of new species and extinction of old ones; (2) the historicity of culture in general and "culture's nature" specifically in the demarcation of a set of landscapes characteristic to a particular nation and piece of human history.

"Wilderness" is a concept which has undergone a radical change in recent years. Owing to the scale of global destruction of the wilderness and its various ecosystems, the idea of wilderness has been transformed from its original negative sense as an Other into a matter of public concern. This as replaced the understanding of "wilderness " not only as a place but as a category closely linked with the development of buman culture. As the result of human practice and representation, nature is thus also political Models and concepts of nature in the creative arts can be indicative of a certain culture's relationship with nature, as they communicate prevailing ideologies. This is particularly pertinent to concepts of nature in Canada where wilderness includes vast tracts of forests, lakes and an Arctic North, which has led to a distinctively Canadian relationship between Canadians and their natural environment. The change in the literary representations of interactions between humankind and environment in Canadian fiction - from the "double vision" resulting from the view of the wilderness both as a threatening Other and free space; to the view of threatened nature as a means of identification; and, finally, as a post-modem place of transgression and possibility - invites questions about both the semiotic threshold between nature and culture, and about the function of boundaries in the constitution of identity.

A logical-philosophical approach to the meaning-carriers or meaning-processes is juxtaposed with the anthropological-biological concepts of subjective significance uniting both for the semiotics of culture and the semiotics of nature. It is assumed that certain objects, which are identifiable in the universe of man and in the world surrounding all living organisms as significant from the perspective of meaning-receivers, meaning-creators and meaning-utilizers, can be determined as signs when they represent other objects, perform certain tasks or satisfy certain needs of subjects. Hence, the meaning of signifying objects may be found in the relation between the expression of a signifier and (I) a signified content, or (2) a signified function, or (3) a signified value of the cultural and natural objects subsumed by the interpreting subjects under the semiotic ones.

A central claim of biosemiotics is the ascription of semiotic competence to nonhumans. For strange historical reasons, this claim has been quite controversial in much of standard biological discourse. An analysis of ethnographic material from Greenland demonstrates that people regard animals as nonhuman "persons". i.e., as sensing and thinking beings. Like humans. animals are supposed to have knowledge about their environment. Taking this semiotic competence as a fact beyond any doubt enables skilled hunters and fishermen to rely not only on their own interpretation of the environment. but also on the animals' interpretation of their environment The behaviour of fish, seals, and land animals, meditated by their acknowledged semiotic competence, can thus be interpreted as giving signs about the behaviour, e.g., of whales and icebergs. This a priori ascription of semiotic competence is also apparent in discussions about management and regulation of animals. Rather than discussing whether "the stock" is depleted, much of the discourse among fishermen and hunters focuses on whether animals can be semiotically disturbed by what people are doing.