Steinbauer, M; Dolos, K; Field, R; Reineking, B; Beierkuhnlein, C: Re-evaluating the general dynamic theory of oceanic island biogeography, Frontiers of Biogeography, 5(3), 185-194 (2013) [Link]

The general dynamic model of oceanic island biogeography integrates temporal changes in ecological circumstances with diversification processes, and has stimulated current research in island biogeography. In the original publication, a set of testable hypotheses was analysed using regression models: specifically, whether island data for four diversity indices are consistent with the ‘B~ATT²’ model, in which B is a diversity index, A is log(area) and T is time. The four indices were species richness, the number and percentage of single-island endemic species, and a diversification index. Whether the relationships between these indices and time are unimodal (i.e., ‘hump-shaped’) was a key focus, based on the characteristic ontogeny of a volcanic oceanic island. However, the significance testing unintentionally used zero, rather than the mean of the diversity index, as the null hypothesis, greatly inflating F-values and reducing P-values compared with the standard regression approach. Here we first re-analyze the data used to evaluate the general dynamic model in the seminal paper, using the standard null hypothesis, to provide an important qualification of its empirical results. This supports the significance of about half the original tests, the rest becoming non-significant but mostly suggestive of the hypothesized relationship. Then we expand the original analysis by testing additional, theoretically derived functional relationships between the diversity indices, island area and time, within the framework of the ATT² model and using a mixed-effects modelling approach. This shows that species richness peaks earlier in island life-cycles than endemism. Area has a greater effect on species richness and the number of single-island endemics than on the proportion of single-island endemics and the diversification index, and was always better fit as a log–log relationship than as a semi-log one. Finally, the richness–time relationship is positively skewed, the initial rise happening much more quickly than the later decline.

Upcoming ...

Fr. 2020-07-10 now
12th BayCEER Workshop 2020: "Call for Abstracts" is open
BayCEER Colloquium:
Th. 2020-07-16
Verschoben auf WS 2020/21! Investigating communal pathogen defense and its role in social evolution
Th. 2020-10-22
Extreme redox oscillations in freshwater re-flooded acid sulfate soil wetlands: Effects on Fe, S, and trace metals geochemical behavior
Ecological-Botanical Garden:
We. 2020-07-01 now
Alle Termine im Juli 2020 entfallen!
Fr. 2020-07-03 now
Gewächshäuser ab sofort wieder geöffnet!
BayCEER Blog
Why Science Communication?
Stoichiometric controls of C and N cycling
Flying halfway across the globe to dig in the dirt – a research stay in Bloomington, USA
EGU – interesting research and free coffee
RSS Blog as RSS Feed
Weather research site
Luftdruck (356m): 980.0 hPa
Lufttemperatur: 18.8 °C
Niederschlag: 0.0 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 17m): 6.8 km/h
Wind (Max.): 14.8 km/h
Windrichtung: N

Globalstrahlung: 91 W/m²
Lufttemperatur: 14.3 °C
Niederschlag: 0.0 mm/24h
Sonnenschein: 8 h/d
Wind (Höhe 32m): 3.1 km/h

This site makes use of cookies More information