Species richness and ecological characterization of myxomycetes and myxomycete-like organisms in the canopy of a temperate deciduous forest
| Autor: | Jens Tesmer, Martin Schnittler, Martin Unterseher |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
0106 biological sciences
0301 basic medicine Physiology Climate Population Species distribution Biology Temperate deciduous forest 010603 evolutionary biology 01 natural sciences Twig Trees 03 medical and health sciences Common species Botany Genetics Animals Myxomycetes Ciliophora education Molecular Biology Ecology Evolution Behavior and Systematics Ecosystem education.field_of_study Ecology Cell Biology General Medicine 030108 mycology & parasitology Spore Deciduous Species richness |
| Zdroj: | Mycologia. 98(2) |
| ISSN: | 0027-5514 |
| Popis: | The ecological community of myxomycetes and myxomycete-like organisms (MMLO) in the canopy of living deciduous trees was studied in a riparian deciduous forest at Leipzig, Germany. A systematic survey carried out with a total of 146 moist chamber cultures resulted in 386 records of 37 taxa, with 32 myxomycetes, two myxobacteria, two protostelids and the fruit body forming ciliate Sorogena stoianovitchae, the latter recorded for the first time for Europe. With 94% of all cultures positive for MMLO, these organisms are present consistently in the investigated sections of white-rotten twigs attached to living trees at 10-30 m above the ground. Our sampling recovered a majority of the likely species, with 37 out of the 42-45 predicted according to a species-accumulation curve and two other estimators of species richness. Nonmetric multidimensional scaling revealed pH, water-holding capacity and stage of decay to explain most of the variation in species distribution. Arcyria cinerea and Perichaena depressa as the most common species occurred in 32% and 29% of all samples, respectively. Viewing the sampled twigs as habitat islands and a single spore as sufficient to establish a population, a simulation program assuming a random spore rain estimated an average of 0.4 and 0.35 spore hits per twig as necessary to explain the observed frequencies. This is matched by the potential productivity of the substrate. All fruit bodies from the cultured twigs would be able to create a spore rain of 86 (A. cinerea) or 40 (P. depressa) spore hits per twig when dispersed evenly over the plot. The terminal fall velocity of spores was measured, revealing that it took about 5 h for a spore to land (30 m) in still air and indicating high dispersal ability for canopy-inhabiting MMLO. |
| Databáze: | OpenAIRE |
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