美国栗树野生种群的持续传播

IF 0.5 4区 环境科学与生态学 Q4 BIODIVERSITY CONSERVATION Northeastern Naturalist Pub Date : 2022-07-20 DOI:10.1656/045.029.0302
Jason Mazurowski, B. Heinrich, Lena Heinrich, C. Loeb, R. Rives
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引用次数: 0

摘要

摘要/ Abstract摘要:本文对1982年在美国缅因州西部森林种植的4棵有种子的美洲板栗(Castanea dentata,美洲板栗)野生种群的繁殖、扩散和更新进行了监测。这棵40岁的母树来自密歇根州北部的一个野生种群,没有明显的枯萎迹象,现在已经结出了20多年的种子。在2019年和2020年进行的两次调查中,我们绘制并测量了1348个后代,从幼苗到接近成熟的树木,大小不一。截至2020年10月,该种群的自然传播距离从母树扩展到至少3.7米,平均传播距离为124米。虽然以前的出版物关注的是导致野生种群扩张的分散囤积行为,但我们报告了影响它们传播、命运和未来预测的可能因素。考虑到附近没有其他美洲栗树的生殖种群,我们的数据提供了从已知的起源点自然传播种子的罕见见解,同时记录了一个功能性灭绝的物种在北方阔叶林生态系统中的回归。
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The Continued Spread of a Wild Population of American Chestnuts
Abstract - We monitored the reproduction, dispersal, and regeneration of a wild population of Castanea dentata (American Chestnut), established from 4 seed-bearing trees planted in a western Maine forest in 1982. The 40-year-old parent trees, sourced from wild stock of a relict population in northern Michigan, show no obvious signs of blight and have been producing viable seeds now for >20 years. Over the course of 2 surveys conducted in 2019 and 2020, we mapped and measured 1348 offspring, varying in size from seedlings to nearly mature trees. As of October 2020, the natural spread of this population had expanded to at least 370 m from the parent trees, with an average dispersal distance of 124 m. While previous publications have focused on the scatter-hoarding behavior that gave rise to this expanding wild population, we report on possible factors affecting their spread, their fate, and prognosis for the future. Given the absence of other reproductive populations of American Chestnut in the immediate vicinity, our data provide rare insights into natural seed dispersal from a known point of origin while documenting the return of a functionally extinct species to a northern hardwood forest ecosystem.
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来源期刊
Northeastern Naturalist
Northeastern Naturalist 环境科学-生态学
CiteScore
1.10
自引率
0.00%
发文量
42
审稿时长
18-36 weeks
期刊介绍: The Northeastern Naturalist covers all aspects of the natural history sciences of terrestrial, freshwater, and marine organisms and the environments of the northeastern portion of North America, roughly bounded from Virginia to Missouri, north to Minnesota and Nunavut, east to Newfoundland, and south back to Virginia. Manuscripts based on field studies outside of this region that provide information on species within this region may be considered at the Editor’s discretion. The journal welcomes manuscripts based on observations and research focused on the biology of terrestrial, freshwater, and marine organisms and communities as it relates to their life histories and their function within, use of, and adaptation to the environment and the habitats in which they are found, as well as on the ecology and conservation of species and habitats. Such studies may encompass measurements, surveys, and/or experiments in the field, under lab conditions, or utilizing museum and herbarium specimens. Subject areas include, but are not limited to, anatomy, behavior, biogeography, biology, conservation, evolution, ecology, genetics, parasitology, physiology, population biology, and taxonomy. Strict lab, modeling, and simulation studies on natural history aspects of the region, without any field component, will be considered for publication as long as the research has direct and clear significance to field naturalists and the manuscript discusses these implications.
期刊最新文献
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