土地利用变化对棕榈种子命运和种群分布的影响Becc。(棕榈科)

IF 1 4区 生物学 Q3 PLANT SCIENCES Folia Geobotanica Pub Date : 2022-02-16 DOI:10.1007/s12224-022-09406-1
Crisliane J. Pereira, Jhonathan Oliveira Silva, Priscyla M. S. Rodrigues, Airton C. Cavalcanti
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引用次数: 3

摘要

棕榈树在热带地区提供几种非木材林产品,通常在人类改造的栖息地中发现。土地利用和覆被变化影响了生境气候条件、生物多样性和棕榈物种的补充和生存。本研究的目的是评价冠状Syagrus coronata (Mart.)的种子命运和种群结构。Becc。(槟榔科)在自然(古老的植被)和管理生境(放牧牧场)。这种棕榈树广泛分布在巴西半干旱地区,没有关于果实收获、管理措施和土地利用对该物种种群持久性造成影响的信息。对400个分散后的成熟果实进行了为期2年的种子命运评价,分别在10、20、40、80、160和240天后进行了种子命运评价。我们还在每个栖息地建立了20个样地(20 × 20 m),间距为30 m,以获取人口统计学数据。总的来说,在受管理的生境中发现了更高的种子死亡率,主要是由于干燥。在苗期优势的自然生境中发现了2090株,而在繁殖成虫优势的管理生境中只发现了45株。人类改造的栖息地,如牧场,对种子的存活产生了负面影响,从而影响了植物的补充。这一物种的未来令人担忧,因为它们目前的果实收获水平、土地覆盖变化,以及气候变化预示着半干旱地区的荒漠化,这使得种子发芽更加困难。该物种的社会和经济重要性加强了增加生物多样性友好型耕作方法的必要性。
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Consequences of land use changes on seed fate and demography in the palm tree Syagrus coronata (Mart.) Becc. (Arecaceae)

Palm trees provide several non-timber forest products in the tropics and are commonly found in human-modified habitats. Land use and cover changes have impacted habitat climatic conditions, biodiversity, and the recruitment and survival of palm species. The objective of this study was to evaluate the seed fate and demographic structure of Syagrus coronata (Mart.) Becc. (Arecaceae) in natural (old-growth vegetation) and managed habitats (pastures for cattle ranching). This palm is widely found in Brazilian semi-arid regions, and there is no information on the impacts caused by fruit harvest, management practices and land use on the persistence of this species’ population. We evaluated seed fate for two years, in which 400 ripe post-dispersal fruits were buried and evaluated after 10, 20, 40, 80, 160 and 240 days. We also established 20 plots (20 × 20 m), 30 m apart, in each habitat to obtain data on population demography. In general, greater seed mortality was found in the managed habitat, mostly as a result of desiccation. We found 2,090 S. coronata individuals in the natural habitat with seedling dominance, while only 45 individuals were found in the managed habitat with reproductive adult dominance. Human-modified habitats, like pastures, negatively affected seed survival and, consequently, plant recruitment. The future of this species is alarming given their current fruit harvesting levels, land cover change, and that climate changes predict desertification in the semi-arid region, making it even more difficult seed germination. The social and economic importance of this species reinforces the need for increasing biodiversity-friendly farming practices.

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来源期刊
Folia Geobotanica
Folia Geobotanica 生物-植物科学
CiteScore
2.40
自引率
0.00%
发文量
18
审稿时长
>12 weeks
期刊介绍: The journal Folia Geobotanica publishes articles in vegetation science, plant ecology and plant systematics, including the topics of temporal community patterns, population and ecosystem ecology, and invasion and conservation ecology. Within the field of plant systematics, Folia Geobotanica welcomes papers on systematic and evolutionary botany, including phylogenetic reconstructions, phylogeographic and biogeographic inferences, studies of microevolutionary processes, taxonomic studies, and broader taxonomic revisions.
期刊最新文献
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