Najas marina ecologie pdf

Variation in the geographic distribution of wetland plant species may be strongly influenced by their ability to use waterbirds, particularly waterfowl to enhance dispersal. Vertebrate seed dispersers are mainly birds and mammals, but also include fish and reptiles. Articles evolutionary perspectives on seed consumption and. It can be found in many types of freshwater and brackish aquatic habitat, including bodies of alkaline water. Mechanism of underwater pollination in najas marina najadaceae. Untitled societa italiana scienza della vegetazione. Najas marina is a species of aquatic plant known by the common names spiny water nymph, spiny naiad and hollyleaved naiad. The three ecologies provides an excellent insight into guattaris stance on politics. Ranocchina maggiore usdanrcs plants database britton, n. Pdf mechanism of underwater pollination in najas marina. All structured data from the file and property namespaces is available under the creative commons cc0 license. Pdf allelopathic activity of ceratophyllum demersum l. While guattari is perhaps best known for his coauthored projects with gilles deleuze. Marinacapitainerie, 207 portovecchio, corse, france ch.

Atlante della flora vascolare del lazio societa botanica. Although seed dispersal by fishes ichthyochory was reported nearly 100 years ago. The three ecologies is one of the final works published by felix guattari 19301992, a french philosopher, political militant and institutional psychoanalyst. On the basis of a compilation of literature reports e. Biotic wetland connectivitysupporting a new approach for wetland policy. It is an extremely widespread species, reported across europe, asia, africa, australia, the americas and many oceanic islands. Files are available under licenses specified on their description page. Film project, research projects, wokue notruc notations on theories of radical urban change. The role of fish in the distribution and germination of seeds of the submerged macrophytes najas marina l. Palaeolimnological responses of nine north african lakes. In the case of najas marina this might explain its limit at the eastern extremity of england and thus its rarity. In contrast, aquatic macrophytes such as najas marina v. Strategies of reproduction, dispersion, and competition in.

A taxonomic revision of the genus hydrilla hydrocharitaceae is presented with a full description, diagnosis, synonyms with typifications, distribution maps and illustrations, also including information on ecology, floral biology, anatomy, embryology, chromosomes, genetics, variation and applied aspects with a rather extensive bibliography. Seed dispersal is an important process for plants, but may be particularly important for plants occurring in spatially isolated habitats like wetlands. Both species prefer mesotrophic, carbonate rich, still or slowrunning water weeda et al. Seeds are shed in autumn and overwinter in lake sediments.

Create marketing content that resonates with prezi video. The importance of the knowledge of these life history traits in the control of the harmful effects caused by aquatic plants and for ecosystem. This page was last edited on 3 january 2016, at 17. Seed dispersal and seed predation by vertebrates are widespread and complex ecological processes that influence the recruitment, spatial distribution, and diversity of plants herrera 2002, hulme and benkman 2002.

Batrachium occurred consistently, perhaps a brackishwater species growing near the inflow. Its vertical distribution varies with the light penetration of the water. Proceedings of the botanical society of the british isles. Antioedipus, a thousand plateaus and what is philosophy. We used controlled feeding and germination experiments to investigate. Thinking emancipatory politics from the urban south 20152017 research projects, situatedupe. Temperature effects on seed maturity and dormancy cycles. The three ecologies felix guattari media ecologies and. In the shallower surrounding zones a reed bed developed, where common reed phragmites australis predominates, although tamarisk tamarix canariensis, cattails typha sp. Najas marina is a summer annual of shallow lakes that reaches its distributional limit in the norfolk broads of eastern england.