The effects of varying temperature on the germination of California natives and invasive plant species

4 different annual plant species found within the California desert were germinated at varying temperatures to determine the overall effect on both successful germination and overall plant mass. 3 species of native plants including Salvia columbarie, Layia platyglossa, and Phacelia tanacetifolia were grown and 1 exotic plant species Bromus rubens. 3 Varying temperature intensities were used including low, medium, and high temperatures. Each species was grown for a total of 6 weeks independently under each treatment. Once the germination trials were completed, individuals were removed from their pots and weighed to determine the overall dry mass.

本实验选取加州荒漠生境下的4种一年生植物，在不同温度条件下开展种子萌发培养试验，以探究温度对种子萌发成功率与植株总生物量的整体影响。实验材料包含3种本土植物：Salvia columbarie、Layia platyglossa以及Phacelia tanacetifolia，外加1种外来植物Bromus rubens。本次实验设置低、中、高3个温度梯度，每个物种在每种温度处理下均独立培养6周。待萌发试验结束后，将植株从花盆中取出，称量其干重以测定总生物量。