Niche conservatism as an emerging principle in ecology and conservation biology.
The diversity of life is ultimately generated by evolution, and much attention has focused on the rapid evolution of ecological traits. Yet, the tendency for many ecological traits to instead remain similar over time [niche conservatism (NC)] has many consequences for the fundamental patterns and processes studied in ecology and conservation biology. Here, we describe the mounting evidence for the importance of NC to major topics in ecology (e.g. species richness, ecosystem function) and conservation (e.g. climate change, invasive species). We also review other areas where it may be important but has generally been overlooked, in both ecology (e.g. food webs, disease ecology, mutualistic interactions) and conservation (e.g. habitat modification). We summarize methods for testing for NC, and suggest that a commonly used and advocated method (involving a test for phylogenetic signal) is potentially problematic, and describe alternative approaches. We suggest that considering NC: (1) focuses attention on the within-species processes that cause traits to be conserved over time, (2) emphasizes connections between questions and research areas that are not obviously related (e.g. invasives, global warming, tropical richness), and (3) suggests new areas for research (e.g. why are some clades largely nocturnal? why do related species share diseases?).
Wiens
John J
JJ
Department of Ecology & Evolution, Stony Brook University, Stony Brook, NY 11794, USA. wiensj@life.bio.sunysb.edu
Ackerly
David D
DD
Allen
Andrew P
AP
Anacker
Brian L
BL
Buckley
Lauren B
LB
Cornell
Howard V
HV
Damschen
Ellen I
EI
Jonathan Davies
T
T
Grytnes
John-Arvid
JA
Harrison
Susan P
SP
Hawkins
Bradford A
BA
Holt
Robert D
RD
McCain
Christy M
CM
Stephens
Patrick R
PR
D044822:Biodiversity; D005075:Biological Evolution; D057231:Climate Change; D003247:Conservation of Natural Resources; D004463:Ecology / Q000639:trends*; D017753:Ecosystem; D020387:Food Chain; D006790:Host-Parasite Interactions; D058865:Introduced Species; D008954:Models, Biological; D010802:Phylogeny