Plant Ecology and Evolution最新文献_第9页

Shrubland biomass and root-shoot allocation along a climate gradient in China 中国不同气候梯度下灌木生物量与根冠分配

IF 1.1 4区生物学

Plant Ecology and Evolution Pub Date : 2021-03-23 DOI: 10.5091/PLECEVO.2021.1570

Jiangchao Guo, Yaoxin Guo, Yongfu Chai, Xiao Liu, M. Yue

{"title":"Shrubland biomass and root-shoot allocation along a climate gradient in China","authors":"Jiangchao Guo, Yaoxin Guo, Yongfu Chai, Xiao Liu, M. Yue","doi":"10.5091/PLECEVO.2021.1570","DOIUrl":"https://doi.org/10.5091/PLECEVO.2021.1570","url":null,"abstract":"Background – Shrublands are receiving increasing attention because of climate change. However, knowledge about biomass allocation of shrublands at the community level and how this is regulated by climate is of limited availability but critical for accurately estimating carbon stocks and predicting global carbon cycles. Methods – We sampled 50 typical shrublands along a climate gradient in China and investigated the biomass allocation of shrubland at the community level and the effect of climate on biomass allocation. Shrub biomass was estimated using species-specific allometric relationships and the biomass of understory herbs was collected by excavating the whole plant. Regression analysis was used to examine the relationships between the biomass and the climate factors. RMA were conducted to establish the allometric relationships between the root and the shoot biomass at the community level. Key results – Shoot, root, and total biomass of shrub communities across different sites were estimated with median values of 206.5, 145.8, and 344.5 g/m2, respectively. Shoot, root, and total biomass of herb communities were estimated at 68.2, 58.9, and 117.2 g/m2, respectively. The median value of the R/S ratio of shrub communities was 0.58 and that of herb communities was 0.84. The R/S ratio of the shrub community showed a negative relationship with mean annual temperature and mean annual precipitation and a positive relationship with total annual sunshine and the aridity index. The R/S ratio of the herb community however showed a weak relationship with climate factors. Shoot biomass of the shrub community was nearly proportional to root biomass with a scaling exponent of 1.17, whereas shoot biomass of the herb community was disproportional to root biomass with a scaling exponent of 2.1. Conclusions – In shrublands, root biomass was more affected than shoot biomass by climate factors and this is related to water availability as a result of biomass allocation change of the shrub community. The understory herb community was less affected by climate due to the modification of the overstory–understory interaction to the climate-induced biomass allocation pattern. Shoot biomass of shrubs scales isometrically with root biomass at the community level, which supports the isometric theory of above-ground and belowground biomass partitioning.","PeriodicalId":54603,"journal":{"name":"Plant Ecology and Evolution","volume":"154 1","pages":"5-14"},"PeriodicalIF":1.1,"publicationDate":"2021-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46328182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Tarennella, a new Pavetteae (Rubiaceae) genus from eastern Madagascar 产自马达加斯加东部的一新科(榄科)属

IF 1.1 4区生物学

Plant Ecology and Evolution Pub Date : 2021-03-23 DOI: 10.5091/PLECEVO.2021.1756

P. Block, F. Rakotonasolo, Sylvain G. Razafimandimbison, A. Davis, S. Janssens

引用次数: 0

Assemblages of myxomycetes associated with three different substrates affected by forest wildfires 受森林野火影响的三种不同基质上黏菌的组合

IF 1.1 4区生物学

Plant Ecology and Evolution Pub Date : 2021-03-23 DOI: 10.5091/PLECEVO.2021.1762

S. Stephenson, Nazrana Payal, G. Kaur, C. Rojas

引用次数: 3

Shared pollinators and sequential flowering phenologies in two sympatric cactus species 两种同域仙人掌的共有传粉昆虫和连续开花酚

IF 1.1 4区生物学

Plant Ecology and Evolution Pub Date : 2021-03-23 DOI: 10.5091/PLECEVO.2021.1544

Erika Arroyo‐Pérez, C. Jiménez-Sierra, J. Hurtado, J. Flores

引用次数: 4

Mating system and female reproductive success of the endemic and endangered epiphyte Rhynchostele cervantesii (Orchidaceae) in a cloud forest in Michoacan, Mexico 墨西哥米却肯云林中特有和濒危附生卷叶兰（兰科）的交配系统和雌性繁殖成功

IF 1.1 4区生物学

Plant Ecology and Evolution Pub Date : 2021-03-23 DOI: 10.5091/PLECEVO.2021.1551

R. Lemus, Irene Ávila-Díaz, Y. H. Diego

{"title":"Mating system and female reproductive success of the endemic and endangered epiphyte Rhynchostele cervantesii (Orchidaceae) in a cloud forest in Michoacan, Mexico","authors":"R. Lemus, Irene Ávila-Díaz, Y. H. Diego","doi":"10.5091/PLECEVO.2021.1551","DOIUrl":"https://doi.org/10.5091/PLECEVO.2021.1551","url":null,"abstract":"Background and aims – The Orchidaceae family is vulnerable, because of the destruction of their habitat, as well as the extraction of individuals from natural populations. This is the case of the genus Rhynchostele Rchb.f.; among the actions considered important for appropriate conservation strategies for this genus is the generation of fundamental knowledge, such as on its reproductive biology. The objective of this work is to understand the mating system and reproductive success of Rhynchostele cervantesii, an endangered epiphytic orchid endemic to Mexico. Material and methods – Manual and open-pollination treatments were conducted during 2014 and 2015 in a cloud forest in Michoacan, Mexico. In each period, 30 to 40 randomly selected inflorescences were subjected to the following treatments: a) spontaneous-self-pollination, b) emasculation, c) self-pollination, d) cross-pollination, and e) open-pollination. The developed fruits were counted and harvested, the viability of the seeds was determined, through the observation and evaluation of embryos using microscopy. Key results – Significant differences were recorded between the treatments in both 2014 and 2015, with higher fruit production in cross-pollination than in self-pollination and natural-pollination. There were significant differences in seed viability, with higher values for seeds from open-pollination and crosspollination and lower values for seeds from self-pollination. Conclusions – Rhynchostele cervantesii is a species that requires pollinators for sexual reproduction because there is no fruit production with spontaneous-self-pollination. Under pollen limitation, the fruit set of natural pollination was a lot lower than in cross-pollination although fruits were the same quality. R. cervantesii had a mixed mating system with a tendency to exogamy, presenting high values of female reproductive success compared to other tropical epiphytic orchid species reported in the literature.","PeriodicalId":54603,"journal":{"name":"Plant Ecology and Evolution","volume":"154 1","pages":"56-62"},"PeriodicalIF":1.1,"publicationDate":"2021-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48299995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Poor fruit set due to lack of pollinators in Aristolochia manshuriensis (Aristolochiaceae) 关马兜铃（马兜铃科）缺乏传粉昆虫导致坐果不良

IF 1.1 4区生物学

Plant Ecology and Evolution Pub Date : 2021-03-23 DOI: 10.5091/PLECEVO.2021.1747

O. V. Nakonechnaya, O. Koren, V. Sidorenko, S. Shabalin, T. Markova, A. Kalachev

{"title":"Poor fruit set due to lack of pollinators in Aristolochia manshuriensis (Aristolochiaceae)","authors":"O. V. Nakonechnaya, O. Koren, V. Sidorenko, S. Shabalin, T. Markova, A. Kalachev","doi":"10.5091/PLECEVO.2021.1747","DOIUrl":"https://doi.org/10.5091/PLECEVO.2021.1747","url":null,"abstract":"Background and aims – Interactions of insects with trap flowers of Aristolochia manshuriensis, a relic woody liana with fragmented natural populations from south-eastern Russia, were studied. Pollination experiments were conducted to identify the causes of the poor fruit set in this plant. Material and methods – The study was carried out at two ex situ sites within the natural range of A. manshuriensis in the suburban zone of the city of Vladivostok (Russia). The floral morphology was examined to verify how it may affect the process of pollination in this species. To test for a probability of self-pollination, randomly selected flowers at the female phase of anthesis (day 1 of limb opening) were hand-pollinated with pollen from the same plant. The daily insect visitation was studied. The pollen limitation coefficient and the number of visitors to the flowers were determined. To identify insects that lay eggs on the flowers, the insects were reared from eggs collected from fallen flowers. Both caught and reared insects were identified. Key results – The floral morphology and the colour pattern of A. manshuriensis are adapted to temporarily trap insects of a certain size. The hand-pollination experiment showed that flowers of this plant are capable of self-pollination by geitonogamy and require a pollinator for successful pollination. The positive value (2.64) for the pollen limitation coefficient indicates a higher fruit set after hand-pollination compared to the control without pollination. The number of visitors to the flowers was low (0.17 visitors per flower per day). Insects from three orders were observed on the flowers: Diptera (up to 90.9%), Coleoptera (8.3%), and Hymenoptera (0.8%). Four species of flies (Scaptomyza pallida, Drosophila transversa (Drosophilidae), Botanophila fugax, and Botanophila sp. 1 (Anthomyiidae)) are capable of transferring up to 2500–4000 pollen grains on their bodies and can be considered as pollinators of A. manshuriensis. Data of the rearing experiment indicate that flies of the families Drosophilidae (S. pallida, D. transversa), Chloropidae (Elachiptera tuberculifera, E. sibirica, and Conioscinella divitis), and Anthomyiidae (B. fugax, B. sp. 1) use A. manshuriensis flowers to lay eggs. Beetles were also collected from the flowers, but they were probably not involved in pollination, because no pollen grains were observed on them during our study. Conclusions – Pollinators of A. manshuriensis include mainly Diptera that lay eggs on the flowers. The poor fruit set (2%) in A. manshuriensis is associated with pollen limitation due to the lack of pollinators, as the number of visitors to flowers was extremely low. This may be due to the fact that the flowers of this species are highly specialized on insects of a certain size for pollination.","PeriodicalId":54603,"journal":{"name":"Plant Ecology and Evolution","volume":"154 1","pages":"39-48"},"PeriodicalIF":1.1,"publicationDate":"2021-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49419161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Moss-inhabiting diatom communities from Ile Amsterdam (TAAF, southern Indian Ocean) 南印度洋阿姆斯特丹岛(TAAF)的苔藓硅藻群落

IF 1.1 4区生物学

Plant Ecology and Evolution Pub Date : 2021-03-23 DOI: 10.5091/PLECEVO.2021.1767

B. Chattová, M. Lebouvier, V. Syrovátka, B. Van de Vijver

引用次数: 5

An escape from the Espinhaço Range: a new species of Paepalanthus subg. Xeractis (Eriocaulaceae) from the campos rupestres of Serra do Padre Ângelo, Minas Gerais, Brazil 艾斯哈帕拉多地区的一次逃种:一新种。来自巴西米纳斯吉拉斯州塞拉多帕德雷Ângelo的干藓科植物

IF 1.1 4区生物学

Plant Ecology and Evolution Pub Date : 2021-03-23 DOI: 10.5091/PLECEVO.2021.1770

C. O. Andrino, P. Gonella

引用次数: 7

Mollinedia ruschii (Monimiaceae, Mollinedioideae), a new Critically Endangered species microendemic to the Atlantic rainforest, eastern Brazil 巴西东部大西洋雨林微特有的一种极危新种——毛茛科毛茛科

IF 1.1 4区生物学

Plant Ecology and Evolution Pub Date : 2021-03-23 DOI: 10.5091/PLECEVO.2021.1741

E. J. Lírio, R. Negrão, P. Sano, A. Peixoto

引用次数: 4

Molecular phylogeny of Atractocarpus (Rubiaceae): taxonomic implications for several New Caledonian Gardenieae species 白术属（茜草科）的分子系统发育：几个新喀里多尼亚栀子属物种的分类学意义

IF 1.1 4区生物学

Plant Ecology and Evolution Pub Date : 2021-03-23 DOI: 10.5091/PLECEVO.2021.1744

A. Mouly, L. Barrabé, David Bruy

{"title":"Molecular phylogeny of Atractocarpus (Rubiaceae): taxonomic implications for several New Caledonian Gardenieae species","authors":"A. Mouly, L. Barrabé, David Bruy","doi":"10.5091/PLECEVO.2021.1744","DOIUrl":"https://doi.org/10.5091/PLECEVO.2021.1744","url":null,"abstract":"Background and aims – New Caledonia is a hotspot of biodiversity in the world. Among the most diverse New Caledonian plant families is Rubiaceae, which consist of 30 genera containing 220 species, with a level of endemism of 93%. The tribe Gardenieae is represented by four genera, Gardenia (8 species), Aidia (2 species), Randia (7 species), and Atractocarpus (10 species). As Randia has now been restricted to the Neotropics, the New Caledonian Randia species remain unplaced within the tribe. Atractocarpus is a Pacific genus, easily characterized by long imbricated stipules, a feature also present in the Randia species and in several Gardenia species in New Caledonia. The aims of the present study are to test the monophyly of Atractocarpus and to assess the phylogenetic placement of the Randia and Gardenia species with long imbricated stipules within Gardenieae and specifically their relationships with taxa of the Porterandia group to which Atractocarpus belongs. Material and methods – We investigated 63 species of Pacific Gardenieae, with a focus on the Porterandia group, in a Bayesian phylogenetic reconstruction (cpDNA: trnTF and rpl32, and nrDNA: ITS). Key results – Our study provides a mostly supported consensus tree topology of the Porterandia group. Five Gardenia and seven Randia species fall within a clade that comprises the New Caledonian Atractocarpus species, rendering both Atractocarpus and Gardenia polyphyletic. Conclusion – We enlarge the delimitation of Atractocarpus to include 12 New Caledonian Randia and Gardenia species. New Caledonia is consequently confirmed as the centre of diversity for Atractocarpus with 31 species. According to our study, three genera of Gardenieae occur in the archipelago: Aidia, Gardenia, and Atractocarpus.","PeriodicalId":54603,"journal":{"name":"Plant Ecology and Evolution","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47584339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1