Australian Journal of Botany (AUST J BOT)
The Australian Journal of Botany is an international journal for publication of original research in plant science. Work on all plant groups, including fossil plants, is published. The journal publishes in the areas of: ecology and ecophysiology; conservation biology and biodiversity; forest biology and management; cell and molecular biology; paleobotany; reproductive biology and genetics; mycology and pathology; and structure and development.
Journal Impact: 1.74*
Journal impact history
|2016 Journal impact||Available summer 2017|
|2015 Journal impact||1.74|
|2014 Journal impact||1.66|
|2013 Journal impact||1.12|
|2012 Journal impact||1.76|
|2011 Journal impact||1.51|
|2010 Journal impact||1.98|
|2009 Journal impact||2.41|
|2008 Journal impact||1.93|
|2007 Journal impact||1.36|
|2006 Journal impact||1.16|
|2005 Journal impact||1.34|
|2004 Journal impact||1.13|
|2003 Journal impact||1.14|
|2002 Journal impact||1.02|
|2001 Journal impact||0.78|
|2000 Journal impact||0.87|
Journal impact over time
|Website||Australian Journal of Botany website|
|Other titles||Australian journal of botany, AJB|
|Material type||Government publication, National government publication, Periodical, Internet resource|
|Document type||Journal / Magazine / Newspaper, Internet Resource|
Publications in this journal
- [Show abstract] [Hide abstract] ABSTRACT: Large old trees often possess important biodiversity and heritage values. This study investigated the occurrence and condition of survey reference trees in a typical rural landscape in New South Wales. A community survey (citizen science) method, in conjunction with a systematic examination of historic maps, was conducted to locate reference trees for subsequent field survey of their biophysical attributes and statistical analyses. In a combined study area ~5000 km2, we found 81 old reference trees, where an estimated 1.3–2.6% of the original number remains. Tree blazes ranged from 14 to 140 years in age, where most were 120–130 years old, and predominately of the Eucalyptus species. Blaze age was strongly correlated with the thickness of bark overgrowth. Types of reference trees identified included several PM (permanent marker) trees, a cemetery marker, a trig station and 15 benchmark (BM) trees. Eleven BM trees located were related to 1928–1932 irrigation surveys and were previously undocumented. Many reference trees were found in minor road reserves or in conjunction with clumps of other large trees. Being a form of living heritage, our results show that survey trees are succumbing to the ravages of time
- [Show abstract] [Hide abstract] ABSTRACT: Anatomical characteristics have proved to be an invaluable asset for supporting taxonomic studies on different plant families, such as Asteraceae. Anatomical features can also help clarify taxonomical and phylogenetic problems in the Aldama La Llave genus, especially among Brazilian representatives. This study focused on Aldama bakeriana, A. discolor, A. grandiflora and A. squalida. These species were chosen because they are difficult to identify taxonomically if the specimens have no flowers; they have biological and pharmacological; and they are representative species from key morphological groups in the Aldama genus and could help in future phylogenetic investigations. Aerial and underground vegetative organs from the four species were described herein for the first time and a comparative analysis was performed to highlight the unique features of each species and determine whether these species can be differentiated in terms of anatomy. All four species analyzed were anatomically very similar. However, they could be differentiated based on the set of anatomical features described for each species. Based on our findings, we concluded that anatomy is able to provide data to assist with the taxonomic problems within the four species analyzed herein. The results also corroborated other studies on the Aldama genus.
- [Show abstract] [Hide abstract] ABSTRACT: Urban greening solutions such as green roofs help improve residents' thermal comfort and building insulation. However, not all plants provide the same level of cooling. This is partially due to differences in plant structure and function, including different mechanisms that plants employ to regulate leaf temperature. Ranking of multiple leaf and plant traits involved in the regulation of leaf temperature (and, consequently, plants' cooling 'service') is not well understood. We, therefore, investigated the relative importance of water loss, leaf colour, thickness and extent of pubescence for the regulation of leaf temperature, in the context of species for semi-extensive green roofs. Leaf temperature was measured with an infrared imaging camera in a range of contrasting genotypes within three plant genera (Heuchera, Salvia and Sempervivum). In three glasshouse experiments (each evaluating three or four genotypes of each genus), we varied water availability to the plants and assessed how leaf temperature altered depending on water loss and specific leaf traits. Greatest reductions in leaf temperature were closely associated with higher water loss. Additionally, in non-succulents (Heuchera, Salvia), lighter leaf colour and longer hair length (on pubescent leaves) both contributed to reduced leaf temperature. However, in succulent Sempervivum, colour and pubescence made no significant contribution; leaf thickness and rate of water loss were the key regulating factors. We propose that this can lead to different plant types having significantly different potentials for cooling. We suggest that maintaining transpirational water loss by sustainable irrigation and selecting urban plants with favourable morphological traits are the key to maximising thermal benefits provided by applications such as green roofs.
- [Show abstract] [Hide abstract] ABSTRACT: The present study was conducted in a semideciduous Brazilian forest to verify whether there were architectural differences during development among tree species that differ in adult stature, such that understorey species maximise light interception and canopy and emergent species maximise height gain to rapidly reach high light environments. The crown illumination index and light interception index of individual trees as well as the variation in form among the understorey species were also analysed. Two understorey, one canopy and one emergent species were chosen, and the individuals were divided into height classes. Architectural comparisons among individuals were evaluated using allometry; crown illumination and light interception indices were compared among species. All comparisons were made within each height class. The two understorey species presented some differences in growth form, but both exhibited greater investment in the crown than did the canopy and emergent species. The crown illumination index did not differ among species, but the light interception index was higher for the understorey species. The results indicated that architectural differences between the studied species arise predominantly because species belong to different strata of the forest. Comparison within height classes was important because it allowed us to evaluate species architectural characteristics throughout plant development that cannot be detected using a single height-class comparison or that can be neglected if individuals of different heights are compared.
- [Show abstract] [Hide abstract] ABSTRACT: Subtropical rainforests in New South Wales (NSW) are distributed on the more fertile forest soils and are nutritionally distinct from the Eucalyptus forests in the same areas. The distribution, cycling of organic matter and nutrients and nutrient use efficiency in an Australian subtropical rainforest were studied and aspects were compared with reported Eucalyptus studies. The available nutrients were greatly in excess of the stand uptake or requirement. A single undisturbed plot within a research trial in mature forest was selected for the study. At the beginning of the study, the aboveground forest biomass was ∼334tha-1 of organic matter and, 22 years later, there was 357tha-1, giving a net accumulation rate of 1.03tha-1year-1, and net primary productivity of 13.0-14.6tha-1year-1. Litterfall and forest-floor analyses indicated a very rapid turnover of organic matter, with an estimated half-life of ∼0.5 years. The quantity of nutrients in the stand was high relative to other forest types in the area, with 1109.2kgNha-1, 62kgPha-1, 1999kgCaha-1, 591kgMgha-1 and 901kgKha-1. Nutrient requirement estimated as nutrient content of the current tissue was estimated to be 107, 5.3, 99, 26 and 61kgha-1year-1 for N, P, Ca, Mg and K, respectively, and uptake defined as removal from the soil was estimated to be 112, 4.7, 128, 37 and 49kgha-1year-1 for the same nutrients, the difference between these being net nutrient redistribution. Nutrient use efficiency (NUE), defined as net primary productivity (NPP) per requirement (tkg-1), was calculated to be 0.12, 2.43, 0.13, 0.50 and 0.21 for N, P, Ca, Mg and K, respectively; these values were low, for example, compared with mature E. pilularis, for which NPP was 0.20, 6.5, 0.43, 1.04 and 0.52tkg-1 for N, P, Ca, Mg and K, respectively. Using NUE defined as NPP per uptake provided comparable estimates. The rainforest represents a forest growing with basically no nutrient limitations, and, as such, is a benchmark for forest nutrient distribution, cycling and NUE.
Data provided are for informational purposes only. Although carefully collected, accuracy cannot be guaranteed. The impact factor represents a rough estimation of the journal's impact factor and does not reflect the actual current impact factor. Publisher conditions are provided by RoMEO. Differing provisions from the publisher's actual policy or licence agreement may be applicable.