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Effect of water quality and season on the population dynamics of Cabomba caroliniana in subtropical Queensland, Australia

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Bickel, T. O. and Schooler, S. S. (2015) Effect of water quality and season on the population dynamics of Cabomba caroliniana in subtropical Queensland, Australia. Aquatic Botany, 123 . pp. 64-71.


Article Link: http://dx.doi.org/10.1016/j.aquabot.2015.02.003

Publisher URL: http://www.sciencedirect.com/science/article/pii/S0304377015000169


Cabomba caroliniana is a submersed aquatic macrophyte that originates from the Americas and is currently invading temperate, subtropical, and tropical freshwater habitats around the world. Despite being a nuisance in many countries, little is known about its ecology. We monitored C. caroliniana populations in three reservoirs in subtropical Queensland, Australia, over 5.5 years. Although biomass, stem length, and plant density of the C. caroliniana stands fluctuated over time, they did not exhibit clear seasonal patterns. Water depth was the most important environmental factor explaining C. caroliniana abundance. Plant biomass was greatest at depths from 2–4 m and rooted plants were not found beyond 5 m. Plant density was greatest in shallow water and decreased with depth, most likely as a function of decreasing light and increasing physical stress. We tested the effect of a range of water physico-chemical parameters. The concentration of phosphorus in the water column was the variable that explained most of the variation in C. caroliniana population parameters. We found that in subtropical Australia, C. caroliniana abundance does not appear to be affected by seasonal conditions but is influenced by other environmental variables such as water depth and nutrient loading. Therefore, further spread will more likely be governed by local habitat rather than climatic conditions.

Item Type:Article
Business groups:Biosecurity Queensland
Keywords:Population fluctuation Invasive plant Submerged macrophyte Depth Seasonality Fanwort
Subjects:Science > Invasive Species > Plants
Science > Microbiology > Microbial ecology
Agriculture > Agriculture (General) > Agricultural ecology (General)
Live Archive:13 Jul 2015 04:25
Last Modified:03 Sep 2021 16:50

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