Plant Ecology & Diversity最新文献_第4页

Visual function of red staminal filaments in a bee-pollinated plant 蜜蜂传粉植物红色雄蕊花丝的视觉功能

IF 1.5 4区生物学

Plant Ecology & Diversity Pub Date : 2022-06-13 DOI: 10.1080/17550874.2022.2103049

Ya-Li Hu, Zhe Chen, Jian-Jun Zhao, Yang Niu, Gang Xu

{"title":"Visual function of red staminal filaments in a bee-pollinated plant","authors":"Ya-Li Hu, Zhe Chen, Jian-Jun Zhao, Yang Niu, Gang Xu","doi":"10.1080/17550874.2022.2103049","DOIUrl":"https://doi.org/10.1080/17550874.2022.2103049","url":null,"abstract":"ABSTRACT Background Floral colour is a primary signal in plant-pollinator interactions. Presumably because bees lack red receptors, bee-pollinated flowers are rarely red. Hypericum (Hypericaceae) is a genus, with yellow flowers and filaments, mainly pollinated by bees. However, one species, H. ascyron exhibits unique red filaments. Aims We tested whether the red filaments influence pollinator visitation frequency and colour perception. Methods We examined whether H. ascyron require pollinators for seed set and compared insect visitation rates of H. ascyron with those of a sympatric yellow-filamented congener. Colour perception by bees was also estimated. Results Pollinator visitation substantially enhanced seed set under natural conditions and flowers of H. ascyron had similar rates of visitation by bees as their yellow-filamented congener. Red filaments per se absorbed ultraviolet light and therefore should not be perceived as a chromatic colour by bees. The chromatic contrasts between filaments and petals as perceived by pollinators was similar between species, whereas achromatic contrasts were higher in H. ascyron. Conclusions Pure-red staminal filaments work as well in attracting potential pollinators as the yellow filaments of congeners. Based on our findings, we suggest that the evolution of red filament colour may have been driven by factors other than pollinator attraction.","PeriodicalId":49691,"journal":{"name":"Plant Ecology & Diversity","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46318781","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

Evidence of short-term shifts in floral traits in response to nectar robbing 花蜜掠夺导致花朵性状短期变化的证据

IF 1.5 4区生物学

Plant Ecology & Diversity Pub Date : 2022-06-13 DOI: 10.1080/17550874.2022.2137382

J. M. Almeida, M. A. Alves

引用次数: 0

Simulated precipitation change drives plant diversity and biomass change in the desert steppe 模拟降水变化驱动荒漠草原植物多样性和生物量变化

IF 1.5 4区生物学

Plant Ecology & Diversity Pub Date : 2022-06-13 DOI: 10.1080/17550874.2022.2101154

Yuehua Wang, Haigang Li, Hailian Sun, Tingting Shen, Xiao-yu Song, Zhanwen Wang, Zhongwu Wang, G. Han

{"title":"Simulated precipitation change drives plant diversity and biomass change in the desert steppe","authors":"Yuehua Wang, Haigang Li, Hailian Sun, Tingting Shen, Xiao-yu Song, Zhanwen Wang, Zhongwu Wang, G. Han","doi":"10.1080/17550874.2022.2101154","DOIUrl":"https://doi.org/10.1080/17550874.2022.2101154","url":null,"abstract":"ABSTRACT Background There is a large uncertainty regarding the direction and magnitude of projected changes in the pattern and quantity of precipitation in future climate change scenarios. As changes in precipitation are likely to greatly impact plant diversity and biomass in desert ecosystems, we undertook a water addition/exclusion experiment to quantify the responses of plant diversity and biomass. Aims To quantify the short-term impacts of changing the quantity of precipitation on plant species diversity and productivity in a desert steppe ecosystem. Methods A simulated precipitation manipulation (addition and exclusion) experiment was made with four treatments: precipitation decreased by 50% (P-50%), precipitation increased by 50% (P+50%), precipitation increased by 100% (P+100%) and natural precipitation (Control). Results The richness of annual and biennial species was related to treatment; above-ground biomass increased in dry years in the P+100% treatment. Water addition had no statistically significant impacts on below-ground biomass. Conclusion Increase in above-ground biomass with added precipitation in a drought year was mainly contributed by perennial grasses, suggesting that, from a management point of view, perennial grasses should be the focus of mitigation of projected future precipitation changes.","PeriodicalId":49691,"journal":{"name":"Plant Ecology & Diversity","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46559441","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: 2

Fertiliser application modulates the impact of interannual climate fluctuations and plant-to-plant interactions on the dynamics of annual species in a Mediterranean grassland 施肥调节了地中海草原年际气候波动和植物间相互作用对一年生物种动态的影响

IF 1.5 4区生物学

Plant Ecology & Diversity Pub Date : 2022-06-13 DOI: 10.1080/17550874.2022.2130718

M. Valerio, A. Gazol, Maria Ripolles, R. Ibáñez

{"title":"Fertiliser application modulates the impact of interannual climate fluctuations and plant-to-plant interactions on the dynamics of annual species in a Mediterranean grassland","authors":"M. Valerio, A. Gazol, Maria Ripolles, R. Ibáñez","doi":"10.1080/17550874.2022.2130718","DOIUrl":"https://doi.org/10.1080/17550874.2022.2130718","url":null,"abstract":"ABSTRACT Background Climate and land-use changes, which include the application of various types of organic and inorganic fertilisers, have been reducing the species diversity of Mediterranean grasslands and threatening its conservation. Annual plants are one of the most diverse functional groups of species in these grasslands, despite suffering competitive pressure from perennial herbaceous and woody species, and they are essential for ecosystem functioning and stability. Aims To quantify how fertilisation modulates the impact of plant-to-plant interactions and climate fluctuations on the dynamics of annuals in Mediterranean grasslands. We hypothesised that the application of sewage sludge would increase competition between functional groups, reducing the abundance of annuals in the long-term, but would buffer the negative impacts of drought on the year-to-year fluctuation of the diversity of annuals. Methods In a semi-natural species-rich Mediterranean grassland in northern Spain, we analysed the changes in the taxonomical and functional composition and diversity of annuals over 14 years in response to variations in the abundance of perennial herbaceous and woody species, climate fluctuations and fertilisation with sewage sludge. We quantified separately the patterns of year-to-year fluctuations and long-term trends. Results The frequency and diversity of annuals decreased with higher abundance of perennial herbaceous species, drought in June and cold winters. The addition of sewage sludge decreased the abundance of annuals in the long-term, seemed to promote competition between annuals and other functional groups at an interannual scale, and mitigated the negative effects of drought and cold. Conclusions Fertilisation influences differently the temporal response of annuals to climate fluctuations and plant-to-plant interactions.","PeriodicalId":49691,"journal":{"name":"Plant Ecology & Diversity","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41497734","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

Functional dominance is a better predictor than functional diversity of above-ground biomass in seasonally dry tropical forests 在季节性干旱的热带森林中，功能优势比地上生物量的功能多样性更好地预测

IF 1.5 4区生物学

Plant Ecology & Diversity Pub Date : 2022-03-04 DOI: 10.1080/17550874.2022.2087114

F. M. Gianasi, C. R. de Souza, V. A. Maia, N. C. A. Fagundes, W. B. da Silva, P. F. Santos, R. M. dos Santos

{"title":"Functional dominance is a better predictor than functional diversity of above-ground biomass in seasonally dry tropical forests","authors":"F. M. Gianasi, C. R. de Souza, V. A. Maia, N. C. A. Fagundes, W. B. da Silva, P. F. Santos, R. M. dos Santos","doi":"10.1080/17550874.2022.2087114","DOIUrl":"https://doi.org/10.1080/17550874.2022.2087114","url":null,"abstract":"ABSTRACT Background The mass ratio hypothesis (functional dominance) and niche complementarity hypothesis (functional diversity) are two potential approaches for making the link between biodiversity and biomass. It is yet unclear how biodiversity and biomass are related in seasonally dry tropical forest (SDTF) communities where there is a seasonal water limitation. Aims The objective of this study was to quantify the effects of environmental filtering on ecosystem functioning, especially those related to biodiversity and above-ground biomass. Methods We estimated biomass and functional traits for all species in five plots at five sites in a SDTF. We related functional diversity and community-weighted trait mean (CWM) values to above-ground biomass (AGB) using linear mixed models. Results Functional diversity was not related to AGB, while CWM values of vessel density (VD) were positively and the Carlquist Vulnerability Index (CVI) was negatively related to AGB. Conclusion The CWM values of functional traits related to the trade-off between safety of water transport and the efficiency of water conductivity and conservative strategies (VD and CVI) were good predictors of AGB. The mass ratio hypothesis appears to be a better predictor of AGB than niche complementarity in our study conducted in the SDTF.","PeriodicalId":49691,"journal":{"name":"Plant Ecology & Diversity","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48761721","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

Quantifying cardinal temperatures and thermal time for seed germination of Papaver dubium and P. rhoeas 杜鹃和杜鹃种子萌发基本温度和热时间的定量研究

IF 1.5 4区生物学

Plant Ecology & Diversity Pub Date : 2022-03-04 DOI: 10.1080/17550874.2022.2088423

S. Golmohammadzadeh, F. Zaefarian, M. Rezvani, Bhagirath S. Chauhan

{"title":"Quantifying cardinal temperatures and thermal time for seed germination of Papaver dubium and P. rhoeas","authors":"S. Golmohammadzadeh, F. Zaefarian, M. Rezvani, Bhagirath S. Chauhan","doi":"10.1080/17550874.2022.2088423","DOIUrl":"https://doi.org/10.1080/17550874.2022.2088423","url":null,"abstract":"ABSTRACT Background Temperature plays a key role in plants distribution. Cardinal temperatures are important parameters for plant population dynamics models. Aims This study was conducted to estimate the cardinal temperatures and other parameters in relation to temperature using three non-linear regression models (segmented, dent-like and beta) to project the germination rate and temperature relation of Papaver dubium and P. rhoeas. Methods An optimisation method was used to fit the models and their statistical parameters. Their efficiency was compared with the coefficient of determination (R2), root mean square error (RMSE) and the Akaike Information Criterion. Results Calculated cardinal temperatures differed for different germination percentiles (10, 30, 50%). The time required to 50% germination of both P. dubium and P. rhoaes was more accurate than the time required to 10% and 30% germination between observed and predicted values. According to the outputs of the segmented model, base, optimum and maximum temperatures of P. rhoeas were 1.9°C, 22.4°C and 39.6°C, respectively. The corresponding values for P. dubium were 2.1°C, 22.1°C and 39.1°C. Conclusions The parameters related to temperature provide the basic information to determine the time needed for germination and to project potentially suitable areas for invasion. The segmented model is appropriate for the estimation of the cardinal temperatures of both Papaver species.","PeriodicalId":49691,"journal":{"name":"Plant Ecology & Diversity","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48956476","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

Epipelic diatom diversity as a bioindicator in River Aturukuku, Eastern Uganda 乌干达东部阿图鲁库库河上浮游硅藻多样性的生物指示

IF 1.5 4区生物学

Plant Ecology & Diversity Pub Date : 2022-03-04 DOI: 10.1080/17550874.2022.2058430

H. Ochieng, Godfrey Magezi, W. P. Gandhi, J. Okot-Okumu, R. Odong

{"title":"Epipelic diatom diversity as a bioindicator in River Aturukuku, Eastern Uganda","authors":"H. Ochieng, Godfrey Magezi, W. P. Gandhi, J. Okot-Okumu, R. Odong","doi":"10.1080/17550874.2022.2058430","DOIUrl":"https://doi.org/10.1080/17550874.2022.2058430","url":null,"abstract":"ABSTRACT Background Despite their key ecological functions and application in biomonitoring, little is known about the algal flora in Uganda, especially those of lotic systems. Aim This study related the community composition of the epipelic diatoms to environmental variables to establish the influence of rural and urban activities on water quality and on the biota on spatial and seasonal scales along River Aturukuku in Eastern Uganda. Methods Epipelic diatoms and selected environmental variables were compared among sites: two urban, a reference site upstream, and a site downstream from the urban area, spanning the dry and wet seasons from February to October, 2018. Results Total phosphorus and nitrogen concentrations were above the natural threshold in the river. The diatom species such as Gyrosigma attenuatum and Placoneis gastrum, tolerant of pollution, dominated in the river. Total phosphorus, pH, temperature, and bottom substrates were most related to the composition of the diatom communities. The abundances of P. gastrum and Sellaphora nyassensis correlated with increased pH at the urban sewage effluent, suggesting that they are potential indicators of this kind of polluted environment. Conclusions: The study provides baseline information on diatom community, and is relevant for biomonitoring and biodiversity conservation in Uganda and other tropical countries.","PeriodicalId":49691,"journal":{"name":"Plant Ecology & Diversity","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47781883","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

Factors that determine the occurrence of native and introduced Spergularia species in Mediterranean coastal ecosystems 决定地中海沿岸生态系统中本地和引进的穗草物种发生的因素

IF 1.5 4区生物学

Plant Ecology & Diversity Pub Date : 2022-03-04 DOI: 10.1080/17550874.2022.2078243

F. Nieva, Rocío Gago, M. Infante-Izquierdo, Alejandro Polo, V. Hermoso, A. Muñoz-Rodríguez

{"title":"Factors that determine the occurrence of native and introduced Spergularia species in Mediterranean coastal ecosystems","authors":"F. Nieva, Rocío Gago, M. Infante-Izquierdo, Alejandro Polo, V. Hermoso, A. Muñoz-Rodríguez","doi":"10.1080/17550874.2022.2078243","DOIUrl":"https://doi.org/10.1080/17550874.2022.2078243","url":null,"abstract":"ABSTRACT Background Studies have found a close correlation between the dispersal of alien species and anthropogenic disturbance. However, in coastal Mediterranean ecosystems, the importance of human induced vs. naturally occurring habitat heterogeneity in influencing the distribution of native vs. exotic species remains poorly understood. Aims Our aim was to identify plant communities where native and introduced Spergularia species occur, the associated soil conditions, the effect of anthropogenic activities, and how these factors determine their distribution in Odiel Marshes Natural Park. Methods The occurrence of seven Spergularia species was studied in 92 vegetation patches. These patches were analysed for plant species composition, edaphic variables (humidity, pH, salinity, organic matter content and particles >0.2 mm), degree of inundation, degree of alteration and level of protection. Results The distribution of 5 native species was related mainly to edaphic factors, while the distribution of 2 species was related to the degree of anthropic impact. Conclusions Spergularia species show three patterns of distribution: S. heldreichii, S. fimbriata and S. media do not occupy altered zones. S. salina and S. nicaeensis naturally inhabit undisturbed habitats, but human alterations have increased their distribution. The presence of S. bocconi and S. purpurea is due to human transformation of this area.","PeriodicalId":49691,"journal":{"name":"Plant Ecology & Diversity","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43882877","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

Constraints, crashes and conservation: were historical African savanna elephants Loxodonta africana densities relatively high or lower than those seen in protected areas today? 限制、崩溃和保护：历史上的非洲大草原大象Loxodonta africana的密度是否比今天在保护区看到的密度相对较高或较低？

IF 1.5 4区生物学

Plant Ecology & Diversity Pub Date : 2022-03-04 DOI: 10.1080/17550874.2022.2078244

D. Wilkinson, J. Midgley, A. Cunningham

引用次数: 0

Effects of plant interactions on the populations of the endangered Fagus pashanica 植物间相互作用对濒危山毛榉种群的影响

IF 1.5 4区生物学

Plant Ecology & Diversity Pub Date : 2022-03-04 DOI: 10.1080/17550874.2022.2056096

Yuen-Gen Liang, Xiao-Xi Yang, Xiao-ya Zhang, Jin-Tun Zhang, Da‐Yong Zhang, Wan‐Jin Liao

{"title":"Effects of plant interactions on the populations of the endangered Fagus pashanica","authors":"Yuen-Gen Liang, Xiao-Xi Yang, Xiao-ya Zhang, Jin-Tun Zhang, Da‐Yong Zhang, Wan‐Jin Liao","doi":"10.1080/17550874.2022.2056096","DOIUrl":"https://doi.org/10.1080/17550874.2022.2056096","url":null,"abstract":"ABSTRACT Background Examining the spatial patterns of species distributions and their underlying processes is important for characterising population dynamics and can provide novel insights for conservation management. However, little attention has been paid to spatial distribution patterns of endangered species. Aims We quantified the effects of plant interactions and environmental heterogeneity on the spatial distribution of endangered Fagus pashanica in communities, to reveal the processes which may account for its population dynamics. Methods We collected spatial coordinates of each tree in communities at three elevations and evaluated the effects of plant interactions and environmental heterogeneity using point pattern analysis. Results Dispersal limitation rather than habitat filtering shaped the spatial patterns of F. pashanica at all three elevations. Intraspecific competition in F. pashanica was found to be significant at middle- and high elevations; interspecific interactions were not significant at any of the three elevations. Conclusions Intraspecific competition significantly affected the spatial patterns of F. pashanica. Dispersal limitation appear to lead to aggregation, while at small spatial scales intraspecific interactions are likely to decrease aggregation due to potential density-dependent thinning effects.","PeriodicalId":49691,"journal":{"name":"Plant Ecology & Diversity","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44701200","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: 2