| Title |
The diversity of freshwater snails in view of the equilibrium theory of island biogeography
|
|---|---|
| Published in |
Oecologia, March 1975
|
| DOI | 10.1007/bf00377585 |
| Pubmed ID | |
| Authors |
Hans Heidemann Lassen |
| Abstract |
The distribution and diversity of Danish freshwater snails is discussed in the light of MacArthur and Wilson's theory of island biogeography. Species-area curves for 86 eutrophic and oligotrophic ponds and lakes are made and the variance to mean ratios of species numbers in lakes of identical sizes calculated. These data indicate that the snail fauna represents a dynamic equilibrium sustained by immigration and extinction. Different properties of small and large bodies of water are discussed with regard to probability of immigration and extinction. Oligotrophic lakes show a steeper species-area curve than eutrophic ones. This is explained by a higher extinction probability in the former but the total species pool is the same for both types of lakes.The freshwater snails are described as a group largely consisting of fugitive species. Physicochemical factors set the ultimative physiological limits to a species but within the main area of distribution biotic interrelations may be of main importance in governing the diversity of local faunas. These considerations probably have a general application to the hololimnic fauna. |
Mendeley readers
The data shown below were compiled from readership statistics for 54 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Spain | 1 | 2% |
| France | 1 | 2% |
| Peru | 1 | 2% |
| Brazil | 1 | 2% |
| Unknown | 50 | 93% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 12 | 22% |
| Student > Master | 8 | 15% |
| Student > Bachelor | 8 | 15% |
| Researcher | 6 | 11% |
| Professor | 4 | 7% |
| Other | 8 | 15% |
| Unknown | 8 | 15% |
| Readers by discipline | Count | As % |
|---|---|---|
| Agricultural and Biological Sciences | 22 | 41% |
| Environmental Science | 16 | 30% |
| Biochemistry, Genetics and Molecular Biology | 2 | 4% |
| Computer Science | 1 | 2% |
| Chemistry | 1 | 2% |
| Other | 0 | 0% |
| Unknown | 12 | 22% |
Attention Score in Context
This research output has an Altmetric Attention Score of 3. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 02 October 2021.
All research outputs
#8,534,976
of 25,374,647 outputs
Outputs from Oecologia
#1,774
of 4,477 outputs
Outputs of similar age
#1,052
of 4,454 outputs
Outputs of similar age from Oecologia
#4
of 6 outputs
Altmetric has tracked 25,374,647 research outputs across all sources so far. This one is in the 43rd percentile – i.e., 43% of other outputs scored the same or lower than it.
So far Altmetric has tracked 4,477 research outputs from this source. They typically receive a little more attention than average, with a mean Attention Score of 7.2. This one is in the 34th percentile – i.e., 34% of its peers scored the same or lower than it.
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We're also able to compare this research output to 6 others from the same source and published within six weeks on either side of this one. This one has scored higher than 2 of them.