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New paper by Pennings and colleagues describes provenance-by-environment interaction in reproductive traits affecting the invasion of Spartina alterniflora in China

Spartina alterniflora, the dominant plant of Georgia salt marshes, is introduced in China, where it has spread to occupy a geographic range similar to that in its native range in North America. Liu et al 2017, Provenance-by-environment interaction of reproductive traits in the invasion of Spartina alterniflora in China, Ecology 98(6):1591-1599, show that, in China, plants at high latitudes are morphologically different and set more seed than plants at low latitudes. Common garden experiments showed that the morphological differences are largely plastic, due to environmental conditions, but that the differences in sexual reproduction are genetic but expressed most strongly in high-latitude gardens (hence the provenance by environment interaction). In the field, the mechanisms of invasion differ by latitude: Spartina spreads by seeds and seedlings at high latitudes but clonal expansion at low latitudes. The lead author, Wenwen Liu, will be spending a year in Steve Pennings' laboratory starting this fall, and hopes to learn more about latitudinal variation in sexual reproduction in Spartina alterniflora in its native range. Surprisingly, we know almost nothing about this topic.

(Contact Steve Pennings for additional information)

submitted Jun 01, 2017


This material is based upon work supported by the National Science Foundation under grants OCE-9982133, OCE-0620959 and OCE-1237140. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.