Effects of Clonal Integration and Architecture on Plant Growth in Natural Resource Landscapes: Test of a Multiple Level Hypothesis in Ecology

克隆整合和结构对自然资源景观中植物生长的影响：生态学中多层次假设的检验

• 批准号: 9507497
• 负责人: Peter Alpert
• 金额: $ 24.57万
• 依托单位: University of Massachusetts Amherst
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-10-01 至 2000-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9507497&HistoricalAwards=false
• 关键词: Effects; Clonal; Integration; Architecture; Plant

Alpert 9507497 Clonal plants include some of the moat invasive, rapidly spreading, and persistent species known. They are also unique among plants in their capacities to place potentially independent units (ramets) non-randomly and to share resources among connected ramets. Two central hypotheses have been developed about clonal plants: (1) that integration among ramets confers significant advantages in habitats where resources are concentrated in small patches; and (2) differences in the degree of integration among clones reflect selection in response to different patterns of resource patchiness - i.e., clonal plants with a certain pattern of how ramets are placed and how they are integrated will be best adapted to an environment with a very specific distribution of light, water, nutrients, etc. Given the invasive potential of clonal plants, understanding the role of plant architecture in allowing the transfer of materials from patches where resources are abundant to patches where resources are limiting is critical in order to be able to predict and mitigate clonal plant invasions of natural or agricultural landscapes. The clonal herb, Fragaria Chiloensis, beach strawberry, is common in coastal sand dunes and grassland communities in Northern California where it plays an important ecological role. On dunes, the nitrogen fixing shrub, Lupinus arboreous, creates a landscape in which high light and soil nitrogen levels occur in different places. In grassland, Lupinus creates high soil nitrogen patches in a uniformly low light environment. In this study it will be determined whether: (1) connected ramets grow faster than unconnected ramets in the field due to resource sharing; and (2) differences in clonal architecture and the degree of sharing will vary between populations taken from dunes versus those from grasslands in a manner consistent with the patchiness of resources in those habitats..

阿尔伯特9507497克隆植物包括一些已知的入侵、快速传播和持久的护城河物种。它们在植物中也是独一无二的，因为它们能够非随机地放置潜在的独立单元(分株)，并在相连的分株之间共享资源。关于克隆植物有两个中心假设：(1)分株之间的整合在资源集中在小块土地上的生境中具有显著的优势；无性系之间整合程度的差异反映了对不同资源斑块模式的选择--即具有特定模式的克隆植物如何放置分株和如何整合将最好地适应具有非常特殊的光、水、营养等分布的环境。考虑到克隆植物的入侵潜力，了解植物结构在允许将材料从资源丰富的斑块转移到资源有限的斑块中的作用，对于能够预测和减轻克隆植物对自然或农业景观的入侵至关重要。海滩草莓是一种克隆草本植物，在加利福尼亚州北部沿海沙丘和草原群落中很常见，在那里它发挥着重要的生态作用。在沙丘上，固氮灌木木羽扇豆属(Lupinus Arboreous)创造了一种高光和土壤氮素水平出现在不同地方的景观。在草原上，羽扇豆属在均匀的低光环境中创造了高土壤氮素斑块。在这项研究中，将确定：(1)由于资源共享，田间连通分株是否比未连通分株生长得更快；以及(2)沙丘种群与草原种群在克隆结构和共享程度上的差异是否与这些生境中资源的斑块一致。