N(2)-fixing tropical legume evolution: a contributor to enhanced weathering through the Cenozoic?
N(2)-fixing tropical legume evolution: a contributor to enhanced weathering through the Cenozoic?
复制标题
N(2)固定热带豆科植物的进化:新生代风化增强的一个贡献者?
DOI:
10.1098/rspb.2017.0370
复制
发表时间:
2017-08-16
期刊:
影响因子:
--
通讯作者:
Beerling DJ
中科院分区:
文献类型:
--
作者:
Epihov DZ;Batterman SA;Hedin LO;Leake JR;Smith LM;Beerling DJ
Fossil and phylogenetic evidence indicates legume-rich modern tropical forests replaced Late Cretaceous palm-dominated tropical forests across four continents during the early Cenozoic (58–42 Ma). Tropical legume trees can transform ecosystems via their ability to fix dinitrogen (N2) and higher leaf N compared with non-legumes (35–65%), but it is unclear how their evolutionary rise contributed to silicate weathering, the long-term sink for atmospheric carbon dioxide (CO2). Here we hypothesize that the increasing abundance of N2-fixing legumes in tropical forests amplified silicate weathering rates by increased input of fixed nitrogen (N) to terrestrial ecosystems via interrelated mechanisms including increasing microbial respiration and soil acidification, and stimulating forest net primary productivity. We suggest the high CO2 early Cenozoic atmosphere further amplified legume weathering. Evolution of legumes with high weathering rates was probably driven by their high demand for phosphorus and micronutrients required for N2-fixation and nodule formation.
登录
查看更多内容
影响因子:
3.4
作者:
Barrett, CF;Parker, MA
通讯作者:
Parker, MA
影响因子:
6.1
作者:
Currano, Ellen D.;Labandeira, Conrad C.;Wilf, Peter
通讯作者:
Wilf, Peter
影响因子:
12.1
作者:
Goudie, Andrew S.;Viles, Heather A.
通讯作者:
Viles, Heather A.
影响因子:
4
作者:
HOMANN, PS;VANMIEGROET, H;WOLFE, GV
通讯作者:
WOLFE, GV
影响因子:
4.9
作者:
Birch, H. F.
通讯作者:
Birch, H. F.