Immigration Rates during Population Density Reduction in a Coral Reef Fish

PloS One
Katrine Turgeon, Donald L Kramer

Abstract

Although the importance of density-dependent dispersal has been recognized in theory, few empirical studies have examined how immigration changes over a wide range of densities. In a replicated experiment using a novel approach allowing within-site comparison, we examined changes in immigration rate following the gradual removal of territorial damselfish from a limited area within a much larger patch of continuous habitat. In all sites, immigration occurred at intermediate densities but did not occur before the start of removals and only rarely as density approached zero. In the combined data and in 5 of 7 sites, the number of immigrants was a hump-shaped function of density. This is the first experimental evidence for hump-shaped, density-dependent immigration. This pattern may be more widespread than previously recognized because studies over more limited density ranges have identified positive density dependence at low densities and negative density dependence at high densities. Positive density dependence at low density can arise from limits to the number of potential immigrants and from behavioral preferences for settling near conspecifics. Negative density dependence at high density can arise from competition for resource...Continue Reading

Citations

Jun 1, 2005·Biological Reviews of the Cambridge Philosophical Society·Diana E Bowler, Tim G Benton
May 13, 2006·Molecular Ecology·Peter M WaserJ Andrew DeWoody
Mar 18, 2009·Journal of Theoretical Biology·Justin M J TravisCalvin Dytham
Apr 15, 2009·Proceedings. Biological Sciences·Leif Egil LoeRolf Langvatn
Mar 23, 2010·The American Naturalist·Tanya DettoPatricia R Y Backwell
Mar 30, 2010·Journal of Theoretical Biology·James O Lloyd-Smith
May 3, 2012·The Journal of Animal Ecology·Katrine Turgeon, Donald L Kramer
May 9, 2012·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Sandrine MeylanJean Clobert
Jun 1, 2012·Oecologia·Salvador Herrando-PérezCorey J A Bradshaw
May 3, 2013·Ecological Applications : a Publication of the Ecological Society of America·Clare L WormaldGraham E Forrester

Related Concepts

Study
Behavior, Animal
Coral
Site
Coral Reefs
Empirical Study
probe gene fragment
Chromis chromis
Local
Immigrant (Person)

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Sexual Dimorphism in Neurodegeneration

There exist sex differences in neurodevelopmental and neurodegenerative disorders. For instance, multiple sclerosis is more common in women, whereas Parkinson’s disease is more common in men. Here is the latest research on sexual dimorphism in neurodegeneration

HLA Genetic Variation

HLA genetic variation has been found to confer risk for a wide variety of diseases. Identifying these associations and understanding their molecular mechanisms is ongoing and holds promise for the development of therapeutics. Find the latest research on HLA genetic variation here.

Super-resolution Microscopy

Super-resolution microscopy is the term commonly given to fluorescence microscopy techniques with resolutions that are not limited by the diffraction of light. Here are the latest discoveries pertaining to super-resolution microscopy.

Genetic Screens in iPSC-derived Brain Cells

Genetic screening is a critical tool that can be employed to define and understand gene function and interaction. This feed focuses on genetic screens conducted using induced pluripotent stem cell (iPSC)-derived brain cells.

Brain Lower Grade Glioma

Low grade gliomas in the brain form from oligodendrocytes and astrocytes and are the slowest-growing glioma in adults. Discover the latest research on these brain tumors here.

CD4/CD8 Signaling

Cluster of differentiation 4 and 8 (CD8 and CD8) are glycoproteins founds on the surface of immune cells. Here is the latest research on their role in cell signaling pathways.

Alignment-free Sequence Analysis Tools

Alignment-free sequence analyses have been applied to problems ranging from whole-genome phylogeny to the classification of protein families, identification of horizontally transferred genes, and detection of recombined sequences. Here is the latest research.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.