Geohistorical and environmental factors on spatial pattern of grass plants (Poaceae) species richness in Taiwan

地史與環境因子對於臺灣禾本科植物的多樣性分布之影響

陳虹諺(Hungyen Chen)

《中華民國雜草學會會刊》 38卷2期 (2017/12) Pp. 159-167

https://doi.org/10.6274/WSSROC.201712_38(2).0159

摘要

Grasses (Poaceae) is the most economically important group of plant to human, providing stable food, forage, building materials, fuel, lawn, sports and ornamental use. However, the spatial pattern of the distribution of grass species diversity in Taiwan remained unclear. In this study, I applied species and genus richness to identify grass species diversity and its composition in ten localities around Taiwan. I conducted statistical analyses to find the relationships between species/genus richness and the geohistorical (land area and population) and environmental (temperature, precipitation, sunshine hours and elevation) factors in Taiwan. The results showed the spatial difference of the grass species diversity and the high values were in middle Taiwan. The species compositions of grass were clustered in four main groups (Taipei, south-western, middle, and eastern Taiwan) depending on their geographical locations. Moreover, the results suggest that the land area and population were the two most important factors on the distribution of grass species diversity in Taiwan.

關鍵字

cereal ； ecological factor ； rice ； species diversity ； weed

並列摘要

禾本科植物包含了許多具有高經濟價值的物種，這些植物不僅是人類主要糧食的來源，也提供了草料、建築材料、燃料、草坪、運動以及裝飾等需求。本研究利用禾本科植物在全臺灣的分布資料，呈現其物種多樣性的地理分布以及不同地域的物種組成差異，並且利用統計分析找出不同地史（土地面積和人口數）及環境（溫度、雨量、日照時數及海拔高度）因子與物種多樣性分布的相關性。結果顯示在臺灣中部有最大的禾本科植物多樣性、物種組成差異主要可將臺灣分成台北、西南部、中部及東部四大區域、物種多樣性的區域差異與土地面積的大小以及人口數的多寡之相關程度最高。

並列關鍵字

穀類植物 ； 生態因子 ； 稻米 ； 物種多樣性 ； 雜草