Structure and dynamics of a Cariniana estrellensis (Lecythidaceae) population in a fragment of Atlantic Forest in Minas Gerais, Brazil

Nunes, Yule Roberta Ferreira; Petrere, Miguel

doi:10.1590/s2175-78602012000200002

Cited by 7 publications

(5 citation statements)

References 41 publications

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“…C. estrellensis is found mainly in Brazil and also occurs in Bolivia, Paraguay and Peru (Leite, 2007). Different densities of the species have been reported, ranging from 5 to 27 trees ha − 1 (Toledo Filho et al, 2000;Nunes and Petrere, 2012). C. estrellensis flowers-creamy white and clustered in axillary racemes-are well distributed over the crown but not produced in large numbers, and physical barriers protect pollen and stigma from insects.…”

Section: Methodsmentioning

confidence: 99%

Small but not isolated: a population genetic survey of the tropical tree Cariniana estrellensis (Lecythidaceae) in a highly fragmented habitat

et al. 2016

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Here, we explore the mating pattern and genetic structure of a tropical tree species, Cariniana estrellensis, in a small population in which progeny arrays (n = 399), all adults (n = 28) and all seedlings (n = 39) were genotyped at nine highly informative microsatellite loci. From progeny arrays we were able to identify the source tree for at least 78% of pollination events. The gene immigration rates, mainly attributable to pollen, were high, varying from 23.5 to 53%. Although gene dispersal over long distance was observed, the effective gene dispersal distances within the small population were relatively short, with mean pollination distances varying from 69.9 to 146.9 m, and seed dispersal distances occurring up to a mean of 119.6 m. Mating system analyses showed that C. estrellensis is an allogamous species (t m = 0.999), with both biparental inbreeding (t m − t s = − 0.016) and selfing rates (s = 0.001) that are not significantly different from zero. Even though the population is small, the presence of private alleles in both seedlings and progeny arrays and the elevated rates of gene immigration indicate that the C. estrellensis population is not genetically isolated. However, genetic diversity expressed by allelic richness was significantly lower in postfragmentation life stages. Although there was a loss of genetic diversity, indicating susceptibility of C. estrellensis to habitat fragmentation, no evidence of inbreeding or spatial genetic structure was observed across generations. Overall, C. estrellensis showed some resilience to negative genetic effects of habitat fragmentation, but conservation strategies are needed to preserve the remaining genetic diversity of this population.

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Section: Methodsmentioning

confidence: 99%

Small but not isolated: a population genetic survey of the tropical tree Cariniana estrellensis (Lecythidaceae) in a highly fragmented habitat

et al. 2016

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“…O grupo das espécies clímax de dossel apresentaram um gradiente de respostas, quanto a mortalidade e o recrutamento, decorrente da diversidade de estratégias presente neste grupo [33,34]. As espécies Chrysophyllum viride e Tetrastylidium grandifolium apresentaram altas taxas de mortalidade acompanhadas de altas taxas de recrutamento, já a população de Quiina glaziovii, se manteve praticamente estacionada, pois apresentou baixa mortalidade associada a ausência de recrutamento no período.…”

Section: Discussionunclassified

“…Plântulas e jovens de espécies típicas de subosque, sob condições de baixa luminosidade, destacam-se por apresentar habilidades para sobreviver nesses ambientes, frequentemente com baixo crescimento [39]. A ausência de incremento neste estádio reflete a capacidade dos indivíduos sobreviverem a longos períodos de supressão formando um banco de plântulas e indivíduos jovens [34,40]. Taxas de crescimento nas florestas tropicais evidenciam uma considerável variação intra e interespecífica [2].…”

Section: Discussionunclassified

Dinâmica populacional de doze espécies arbóreas de diferentes grupos ecológicos em um trecho de Floresta Ombrófila Densa Submontana

et al. 2018

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Estudos de dinâmica populacional podem contribuir na classificação das espécies em grupos ecológicos. O presente estudo teve como objetivo descrever a dinâmica populacional de 12 espécies arbóreas de diferentes grupos ecológicos e verificar se espécies com diferentes capacidades de tolerância à sombra diferem quanto à taxa de mortalidade, taxa de recrutamento e ao crescimento em altura e diâmetro. A área de estudo localiza-se na região sul do estado de São Paulo, município de Sete Barras, no interior do Parque Estadual de Carlos Botelho, em uma parcela permanente de 10 ha. Sorteamos 25 subparcelas de 20 x 20 m, onde foram realizadas duas amostragens dos indivíduos com altura ≥ 3 cm. A taxa de mortalidade foi menor para as espécies clímax de subosque, e apenas duas espécies deste grupo apresentaram incremento populacional, Inga marginata (0,04) e Rudgea jasminoides (0,05), já as espécies secundárias iniciais e de dossel apresentaram um contínuo de respostas. A taxa de recrutamento e o crescimento em altura e diâmetro não diferiram entre as espécies com diferentes níveis de tolerância à sombra.Estudos de dinâmica populacional podem contribuir na classificação das espécies em grupos ecológicos. O presente estudo teve como objetivo descrever a dinâmica populacional de 12 espécies arbóreas de diferentes grupos ecológicos e verificar se espécies com diferentes capacidades de tolerância à sombra diferem quanto à taxa de mortalidade, taxa de recrutamento e ao crescimento em altura e diâmetro. A área de estudo localiza-se na região sul do estado de São Paulo, município de Sete Barras, no interior do Parque Estadual de Carlos Botelho, em uma parcela permanente de 10 ha. Sorteamos 25 subparcelas de 20 x 20 m, onde foram realizadas duas amostragens dos indivíduos com altura ≥ 3 cm. A taxa de mortalidade foi menor para as espécies clímax de subosque, e apenas duas espécies deste grupo apresentaram incremento populacional, Inga marginata (0,04) e Rudgea jasminoides (0,05), já as espécies secundárias iniciais e de dossel apresentaram um contínuo de respostas. A taxa de recrutamento e o crescimento em altura e diâmetro não diferiram entre as espécies com diferentes níveis de tolerância à sombra.

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“…物个体的集合, 是物种生存、发展和进化的基本单位, 也是连接生物个体、群落和生态系统的关键纽带(赵阳等, 2020)。种群结构与动态是种群生态学研究的两个核心内容 (Helt & Loucks, 1976;Chhetri et al, 2016), 前者是指种群内个体的年龄、大小、数量及其配置情况 (Nunes & Petrere Jr, 2012;张亚芳等, 2015); 后者则是种群数量的时空变化(谭一波等, 2010)。基于静态生命表所构建的存活曲线、数量动态指数、生存函数、谱分析以及时间序列预测模型是研究植物种群结构与动态的重要方法 (Harcombe, 1987;李艳丽等, 2014;杨立荣等, 2018;秦爱丽, 2020), 不仅可以用来分析种群当前的生存状态及其与环境间的适合度 (Wang et al, 2004;肖宜安等, 2004) x + 1龄级的死亡个体数, d x = l x -l x+1 ; 6) q x , 从x龄级到…”

Section: 种群是指在一定时间内占据一定空间的同种生unclassified

Population age structure and dynamics of <i>Pinus koraiensis</i> in a broadleaved Korean pine forest in Changbai Mountain, China

ZHANG¹,

GE²,

LIANG³

et al. 2022

Chinese Journal of Plant Ecology

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AimsTo provide a theoretical basis for the protection and restoration of broadleaved Korean pine forest in Changbai Mountain area, the population age structure and quantitative dynamics of Pinus koraiensis were investigated. Methods We used field data to form the static life table, estimate the population quantitative indexes, and to fit the survival and mortality curves for identifying the population characteristics of P. koraiensis. We also used the survival functions and spectral analysis to explore its population age structure and to reveal natural regeneration processes and as well as future developmental trend. Important findings Based on the distribution of diameter, the population of P. koraiensis could be sorted into 14 age classes and combined into four subpopulations, i.e., juvenile (I-III), middle-age (IV-VI), adult (VII-X) and old (XI-XIV) stages. By contrast, the number of individuals in population was higher in stages of young and adult and lower in middle and old stages. However, the survival curve of population was close to Deevey-III type, reflecting that the high mortality occurred in juvenile stage. In addition, external random interference was crucial for whole population dynamics. With and without such interference, the population of P. koraiensis become the constant type (V′ pi was close to 0) and increasing type (V pi  0), respectively. Moreover, the survival function analysis showed that the number of individuals of this species was dramatically decreased in early stage, and then relatively stable in middle-age stage and declined again in late stage. Furthermore, spectral analysis for this population indicated that the pattern of natural regeneration exhibited periodic fluctuation along successional process. With population development,

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Structure and dynamics of a Cariniana estrellensis (Lecythidaceae) population in a fragment of Atlantic Forest in Minas Gerais, Brazil

Cited by 7 publications

References 41 publications

Small but not isolated: a population genetic survey of the tropical tree Cariniana estrellensis (Lecythidaceae) in a highly fragmented habitat

Small but not isolated: a population genetic survey of the tropical tree Cariniana estrellensis (Lecythidaceae) in a highly fragmented habitat

Dinâmica populacional de doze espécies arbóreas de diferentes grupos ecológicos em um trecho de Floresta Ombrófila Densa Submontana

Population age structure and dynamics of <i>Pinus koraiensis</i> in a broadleaved Korean pine forest in Changbai Mountain, China

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