Demography of the understory herb H eliconia acuminata ( H eliconiaceae) in an experimentally fragmented tropical landscape
Demography of the understory herb H eliconia acuminata ( H eliconiaceae) in an experimentally fragmented tropical landscape
复制标题
实验性破碎热带景观中林下草本植物 Heliconia acuminata (Heliconiaceae) 的人口统计
DOI：
10.1002/ecy.4174
复制
发表时间：
2023
期刊：
影响因子：
4.8
通讯作者：
Kress, W. John
中科院分区：
文献类型：
--
作者：
Bruna, Emilio M.;Uriarte, María;Darrigo, Maria Rosa;Rubim, Paulo;Jurinitz, Cristiane F.;Scott, Eric R.;Ferreira da Silva, Osmaildo;Kress, W. John
生境破碎化在被提出威胁生态系统的完整性几十年后，仍然是生态学家研究的主要焦点。虽然研究记录了碎片化景观中的无数生物变化，包括物种从碎片中局部灭绝，但这些灭绝背后的人口统计机制鲜为人知。然而，其中许多--特别是在低地热带森林--被认为是由以下两种机制之一驱动的：(1)由于传粉者和种子传播者的多样性或丰度的变化而减少碎片的招募，或(2)由于非生物条件的显著变化而增加碎片的个体死亡率，特别是在碎片边缘附近。不幸的是，由于缺乏在森林碎片和连续森林地点收集的长期和全面的人口数据，对这些潜在机制的测试很少。在这里，我们报告了11个 年(1998年至2009年)的亚马逊林下草本植物Heliconia acumata(LC Rich.)发现于巴西的森林碎片生物动力学项目(BDFFP)。该数据集包括8586株植物的66,000株×年记录，其中包括在第一次普查后建立的3464株苗木。7个种群在实验分离的片断中(4个1公顷片断和3个10公顷片断各1个)，其余6个种群在连续森林中。每个种群都在一个50×100 m的永久样地中，样地之间的距离从500 m到60 km不等。每年对每一块地的植物进行普查，当时我们记录、识别、标记和测量新的苗木，识别任何以前标记的死亡植物，并记录幸存个体的大小。每一块地还在花期进行了四到五次调查，以确定生殖植物并记录每一块地产生的花序数量。这些数据被用来研究各种主题，从与萌发相关的碎片化减少如何影响种群动态，到分析繁殖率的统计方法。这种先前使用的广度反映了这些数据对未来研究人员的价值。除了分析植物对生境片断化的反应外，这些数据还可用于解决植物人口学和热带植物进化生态学中的基本问题，并开发和测试人口模型和工具。虽然我们欢迎与感兴趣的用户合作的机会，但对此数据集的使用没有限制。然而，我们确实要求那些将数据用于教学或研究目的的人告知我们他们是如何这样做的，并在适当的时候引用这篇论文和数据档案。任何使用该数据的出版物还必须在确认中包括BDFFP技术序列号。作者可以在他们的文章被接受后，通过联系BDFFP的科学协调员或E.M.Bruna来索取这个系列号。
Habitat fragmentation remains a major focus of research by ecologists decades after being put forward as a threat to the integrity of ecosystems. While studies have documented myriad biotic changes in fragmented landscapes, including the local extinction of species from fragments, the demographic mechanisms underlying these extinctions are rarely known. However, many of them—especially in lowland tropical forests—are thought to be driven by one of two mechanisms: (1) reduced recruitment in fragments resulting from changes in the diversity or abundance of pollinators and seed dispersers or (2) increased rates of individual mortality in fragments due to dramatically altered abiotic conditions, especially near fragment edges. Unfortunately, there have been few tests of these potential mechanisms due to the paucity of long‐term and comprehensive demographic data collected in both forest fragments and continuous forest sites. Here we report 11 years (1998–2009) of demographic data from populations of the Amazonian understory herbHeliconia acuminata(LC Rich.) found at Brazil's Biological Dynamics of Forest Fragments Project (BDFFP). The data set comprises >66,000 plant×year records of 8586 plants, including 3464 seedlings established after the first census. Seven populations were in experimentally isolated fragments (one in each of four 1‐ha fragments and one in each of three 10‐ha fragments), with the remaining six populations in continuous forest. Each population was in a 50×100 m permanent plot, with the distance between plots ranging from 500 m to 60 km. The plants in each plot were censused annually, at which time we recorded, identified, marked, and measured new seedlings, identified any previously marked plants that died, and recorded the size of surviving individuals. Each plot was also surveyed four to five times during the flowering season to identify reproductive plants and record the number of inflorescences each produced. These data have been used to investigate topics ranging from the way fragmentation‐related reductions in germination influence population dynamics to statistical methods for analyzing reproductive rates. This breadth of prior use reflects the value of these data to future researchers. In addition to analyses of plant responses to habitat fragmentation, these data can be used to address fundamental questions in plant demography and the evolutionary ecology of tropical plants and to develop and test demographic models and tools. Though we welcome opportunities to collaborate with interested users, there are no restrictions on the use of this data set. However, we do request that those using the data for teaching or research purposes inform us of how they are doing so and cite this paper and the data archive when appropriate. Any publication using the data must also include a BDFFP Technical Series Number in the Acknowledgments. Authors can request this series number upon the acceptance of their article by contacting the BDFFP's Scientific Coordinator or E. M. Bruna.