Australian Journal of Botany最新文献_第5页

Unpacking the recruitment potential of seeds in reconstructed soils and varying rainfall patterns 揭示种子在重建土壤和不同降雨模式中的招募潜力

IF 1.1 4区生物学

Australian Journal of Botany Pub Date : 2023-01-01 DOI: 10.1071/bt22141

T. E. Erickson, J. Dwyer, Emma L. Dalziell, J. James, M. Muñoz‐Rojas, D. Merritt

引用次数: 1

Are orthodox Australian rainforest seeds short-lived in storage? 正统的澳大利亚热带雨林种子储存寿命短吗?

IF 1.1 4区生物学

Australian Journal of Botany Pub Date : 2023-01-01 DOI: 10.1071/bt22104

K. Sommerville, Z. Newby, Amelia J. Martyn Yenson, C. Offord

引用次数: 1

Maintaining separate maternal lines increases the value and applications of seed collections 保持单独的母系增加了种子收集的价值和应用

IF 1.1 4区生物学

Australian Journal of Botany Pub Date : 2023-01-01 DOI: 10.1071/bt22136

M. M. van der Merwe, Jason G. Bragg, Richard Dimon, Patrick S. Fahey, P. Hogbin, Patricia Lu-Irving, A. Mertin, M. Rossetto, Trevor C. Wilson, J. Yap

引用次数: 1

Assessing plant translocation success: common metrics mask high levels of inbreeding in a recently established Banksia brownii (Proteaceae) population 评估植物易位成功:常见的指标掩盖了最近建立的班克斯布朗(变形科)种群的高水平近交

IF 1.1 4区生物学

Australian Journal of Botany Pub Date : 2023-01-01 DOI: 10.1071/bt22071

R. Dillon, D. Coates, R. Standish, L. Monks, M. Waycott

引用次数: 0

Environmental variation in an increasing incidence of dead trees in lowland to subalpine eucalypt forests and woodlands 2011–2021 2011-2021年低地至亚高山桉树林和林地枯死树发生率增加的环境变化

IF 1.1 4区生物学

Australian Journal of Botany Pub Date : 2023-01-01 DOI: 10.1071/bt22119

Zimeng Liu, J. Kirkpatrick

引用次数: 0

The impact of climate change and wildfire on decadal alpine vegetation dynamics 气候变化和野火对高寒植被年代际动态的影响

IF 1.1 4区生物学

Australian Journal of Botany Pub Date : 2023-01-01 DOI: 10.1071/bt23002

Brodie Verrall, Patrick Norman, B. Mackey, Scout Fisher, Jack Dodd

引用次数: 1

Pre-dispersal seed-predation affects fruit crop and seed fitness in a highly fragmented savanna tree 在高度碎片化的热带稀树草原上，种子捕食对果实作物和种子适应性的影响

IF 1.1 4区生物学

Australian Journal of Botany Pub Date : 2023-01-01 DOI: 10.1071/bt23011

S. Heyes, J. Morgan, S. Sinclair, Z. Walker, S. Hoebee

引用次数: 0

Floral biology, pollination vectors and breeding system of Zieria granulata (Rutaceae), an endangered shrub endemic to eastern Australia 澳大利亚东部特有的濒危灌木细粒紫狐的花生物学、传粉媒介和育种系统

IF 1.1 4区生物学

Australian Journal of Botany Pub Date : 2023-01-01 DOI: 10.1071/bt22055

Laura C. Lopresti, K. Sommerville, Amy‐Marie Gilpin, T. E. Minchinton

{"title":"Floral biology, pollination vectors and breeding system of Zieria granulata (Rutaceae), an endangered shrub endemic to eastern Australia","authors":"Laura C. Lopresti, K. Sommerville, Amy‐Marie Gilpin, T. E. Minchinton","doi":"10.1071/bt22055","DOIUrl":"https://doi.org/10.1071/bt22055","url":null,"abstract":"Context . Understanding the factors that in ﬂ uence viable-seed production is crucial in the conservation of threatened plant species, yet these factors are often poorly understood. Aims . We investigated the reproductive biology of Zieria granulata C.Moore ex Benth., an endangered Australian endemic with a limited distribution, with the intent of improving conservation and restoration outcomes. Methods . Components of ﬂ oral biology, including ﬂ oral ontogeny and nectar production, were quanti ﬁ ed to determine the pollination syndrome and the likely breeding system. Flower-visitor surveys (using both digital video recordings and human observations), a manipulative wind-pollination experiment and hand-pollination experiments were conducted to investigate pollination vectors and con ﬁ rm the breeding system. Key results . Z. granulata ﬂ owers were small, white, protandrous and produced highly ornamented pollen grains and small quantities of nectar; these characteristics suggest that the species ﬁ ts the general entomophily syndrome. All ﬂ oral visitors were arthropod species and of the 72 visitors observed, predominantly from the Dipteran and Hymenopteran families, 18 could be regarded as potential pollinators. Failure of simulated wind gusts (40 km h − 1 ) to transport pollen ≥ 5 cm indicated that anemophily is unlikely for this species. Autonomous and manipulative sel ﬁ ng did not result in viable seed set, indicating that this is an obligate outcrossing species. However, fruit and viable-seed production was highly variable within and among some other treatments. Pre-dispersal seed predation was recorded at all study sites. Conclusions . Pre-dispersal seed predation was recorded at all study sites and is a likely factor inhibiting viable-seed production. Implications . This knowledge will be used to improve seed yield for collections used for ex situ conservation and restoration programs for the endangered Z. granulata .","PeriodicalId":8607,"journal":{"name":"Australian Journal of Botany","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"58547493","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

Mechanical control inadvertently increases risk of alien plant invasion: influence of stem fragmentation and inundation regimes on Arundo donax regeneration in Neotropical savanna 机械控制无意中增加了外来植物入侵的风险:茎碎化和淹没制度对新热带稀树草原上芦笋再生的影响

IF 1.1 4区生物学

Australian Journal of Botany Pub Date : 2023-01-01 DOI: 10.1071/bt22139

E. Calazans, A. Lopes, L. Girotto, A. de Paula, A. C. Franco, C. S. Ferreira

引用次数: 0

Climate change or tree disease: challenges for diagnosing causes of forest die-off 气候变化或树木疾病:诊断森林死亡原因的挑战

4区生物学

Australian Journal of Botany Pub Date : 2023-01-01 DOI: 10.1071/bt23039

George Matusick, Katinka X. Ruthrof, Peter Scott, Giles E. St. J. Hardy

{"title":"Climate change or tree disease: challenges for diagnosing causes of forest die-off","authors":"George Matusick, Katinka X. Ruthrof, Peter Scott, Giles E. St. J. Hardy","doi":"10.1071/bt23039","DOIUrl":"https://doi.org/10.1071/bt23039","url":null,"abstract":"Context Forest ecosystems experience compositional and structural changes as species’ environmental envelopes shift with climate change. Extreme climate events and pests/pathogens are driving these ecosystem changes. Determining which of the two potential drivers is causing a particular forest die-off can be challenging. In south-western Australia, widespread forest die-off in 2011 coincided with extremely hot and dry conditions. It occurred in a forest ecosystem that has historically experienced Phytophthora cinnamomi root disease (Phytophthora dieback).Aims To determine whether the causal agent of Phytophthora dieback, P. cinnamomi, was associated with forest die-off in the Northern Jarrah Forest.Methods A combination of direct (isolation of pathogen) and indirect (survey of susceptible indicator plant species) measurements were taken inside and outside patches of forest experiencing the die-off.Key results There was no consistent association between die-off patches and the presence of P. cinnamomi. P. cinnamomi was isolated from 3 of 33 control plots and 3 of 33 die-off plots. Although several plant species susceptible to P. cinnamomi were absent from die-off plots, the findings were inconsistent across species. This may be explained by plant tolerance to high temperatures and drought.Conclusions P. cinnamomi was not the proximate cause of the observed die-off in the Northern Jarrah Forest in 2011.Implications Novel disturbance caused by extreme climate events can mimic damage caused by certain pests/pathogens. More research is needed to determine the tolerances of plants to extreme temperature and drought conditions to disentangle abiotic and biotic drivers of tree die-off.","PeriodicalId":8607,"journal":{"name":"Australian Journal of Botany","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135447789","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