Tree Species Selection by Free-Ranging Koala Populations in Victoria.

1985 ◽  
Vol 12 (2) ◽  
pp. 137 ◽  
Author(s):  
MA Hindell ◽  
KA Handasyde ◽  
AK Lee
Keyword(s):  
Tree Species ◽  
Species Selection ◽  
Phascolarctos Cinereus ◽  
Individual Trees ◽  
Free Ranging

Tree species selection was studied in free-ranging populations of koalas [Phascolarctos cinereus] on Phillip Island and the Brisbane Ranges in Victoria. At both sites koalas were found mainly on Eucalyptus spp. but occasionally used Acacia spp. Although koalas occurred on most of the Eucalyptus spp. present, both populations showed preferences for one or two species, particularly E. viminalis. Individual koalas showed different preferences, but the majority preferred E. viminalis. Some occurred exclusively on other species even when E. viminalis was close by. Koalas also showed preference for individual trees within a species.

scholarly journals EVALUASI KESESUAIAN DAN KELAYAKAN POHON PENYUSUN RUANG TERBUKA HIJAU DI KIDS FUN PARK YOGYAKARTA

2019 ◽  
Author(s):  
DINDA PUTRI NEVISIA
Keyword(s):  
Tree Species ◽  
Good Condition ◽  
Data Retrieval ◽  
Species Selection ◽  
Open Spaces ◽  
Amusement Park ◽  
Individual Trees ◽  
Research Show ◽  
Exploration Inventory ◽  
Descriptive Qualitative

Kids Fun Park is a well-known amusement park either for children or adults in Daerah Istimewa Yogyakarta (DIY) and also enthused by tourist from inside or outside of Yogyakarta. This park also has a green open spaces as its supporting component, thus the condition of the trees in the green open spaces needed an attention. This study conducted in order to optimize the function of the green open spaces by optimizing its functions through a tree species selection and the presence of the pest. The method used in this research is descriptive qualitative. The procedure of data retrieval is done by exploration, inventory, identification, interview, and evaluation. To facilitate research, the research location was divided into 4 sections based on the function area and the form of the game. The results of research show that Kids Fun Park has 381 individual trees from 43 species and 22 families. Overall positioning of tree species is appropriate and in good condition and healthy without any pests that attack so still feasible for tunt. However, there are 3 types of trees that less appropriate are nangka, kelapa and palem sadeng.

Tree use, diet and home range of the koala (Phascolarctos cinereus) at Blair Athol, central Queensland

2002 ◽  
Vol 29 (3) ◽  
pp. 303 ◽  
Author(s):  
W. A. H. Ellis ◽  
A. Melzer ◽  
F. N. Carrick ◽  
M. Hasegawa
Keyword(s):  
Home Range ◽  
Coal Mine ◽  
Tree Species ◽  
Diet Selection ◽  
Home Ranges ◽  
Phascolarctos Cinereus ◽  
Males And Females ◽  
Free Ranging

Free-ranging koalas (Phascolarctos cinereus) were monitored by means of radio-relocation in the area of Blair Athol Coal Mine and surrounding properties. Daytime tree use, home range and diet of these koalas was determined in spring and autumn, as was the leaf moisture composition of potential fodder species. Koalas used on average 93 (male koalas) and 56 (female koalas) trees during the period of observation, occupying home ranges of 135 and 101 ha respectively. Mean sightings per tree were 1.19 for both males and females and home-range sizes were not significantly different between sexes or seasons. Koalas were observed returning to previously used daytime roosting trees infrequently (<12%). Although koalas were observed roosting in trees of the species that they ate, proportional species representation in the diet of these koalas during spring and autumn did not accurately reflect concurrent observations of their daytime tree-roosting behaviour. Koalas were observed to utilise non-fodder species for daytime roosting, and patterns of daytime tree use and diet selection varied between individuals inhabiting adjacent communities within the site. Leaf moisture of tree species represented in koala diets was greater in autumn than spring.

Tree use by koalas (Phascolarctos cinereus) after fire in remnant coastal forest

2007 ◽  
Vol 34 (2) ◽  
pp. 84 ◽  
Author(s):  
Alison Matthews ◽  
Daniel Lunney ◽  
Shaan Gresser ◽  
Wendy Maitz
Keyword(s):  
Resource Use ◽  
Tree Species ◽  
Resource Depletion ◽  
Radio Tracking ◽  
Coastal Forest ◽  
Short Term ◽  
Phascolarctos Cinereus ◽  
Ecological Information ◽  
Individual Trees

The aim of this study was to examine the effects of fire on resource use by a population of koalas in remnant coastal forest. Fifty-five koalas were monitored regularly by radio-tracking for up to 35 months. The attributes of each tree in which the koala was sighted were recorded, giving a total of 8390 records. Analyses were undertaken on a range of ecological information. Regeneration of the forest began immediately following the fires and within three months koalas were seen among the epicormic growth. From a total 4631 trees used by koalas, 3247 (70%) were burnt. Observations of koalas feeding included 53% in burnt trees. Koalas changed trees frequently; individual trees were used once only on 3555 occasions (42% of all observations). Of all the trees used, 95% were used by only one collared koala; no trees were used by more than three koalas. Swamp mahogany (Eucalyptus robusta) was the tree species most frequently used by koalas, particularly at night and by breeding females. Koalas preferred trees of larger diameter (>30 cm) and used significantly taller trees during summer. This study has shown that resource depletion from intense wildfire is short-term for koalas because they utilise burnt trees within months of the fire for both food and shelter.

scholarly journals Using Discrete-Point LiDAR to Classify Tree Species in the Riparian Pacific Northwest, USA

2021 ◽  
Vol 13 (14) ◽  
pp. 2647
Author(s):  
Julia Tatum ◽  
David Wallin
Keyword(s):  
Pacific Northwest ◽  
Tree Species ◽  
3D Structure ◽  
Alnus Rubra ◽  
Populus Balsamifera ◽  
Segmentation Method ◽  
Black Cottonwood ◽  
Riparian Landscape ◽  
Individual Trees ◽  
Species Mapping

Practical methods for tree species identification are important for both land management and scientific inquiry. LiDAR has been widely used for species mapping due to its ability to characterize 3D structure, but in structurally complex Pacific Northwest forests, additional research is needed. To address this need and to determine the feasibility of species modeling in such forests, we compared six approaches using five algorithms available in R’s lidR package and Trimble’s eCognition software to determine which approach most consistently identified individual trees across a heterogenous riparian landscape. We then classified segments into Douglas fir (Pseudotsuga menziesii), black cottonwood (Populus balsamifera ssp. trichocarpa), and red alder (Alnus rubra). Classification accuracies based on the best-performing segmentation method were 91%, 92%, and 84%, respectively. To our knowledge, this is the first study to investigate tree species modeling from LiDAR in a natural Pacific Northwest forest, and the first to model Pacific Northwest species at the landscape scale. Our results suggest that LiDAR alone may provide enough information on tree species to be useful to land managers in limited applications, even under structurally challenging conditions. With slight changes to the modeling approach, even higher accuracies may be possible.

scholarly journals Tree Species Selection in the Face of Drought Risk—Uncertainty in Forest Planning

Forests ◽  
2017 ◽  
Vol 8 (10) ◽  
pp. 363 ◽  
Author(s):  
Matthias Albert ◽  
Ralf-Volker Nagel ◽  
Robert Nuske ◽  
Johannes Sutmöller ◽  
Hermann Spellmann
Keyword(s):  
Tree Species ◽  
Species Selection ◽  
Forest Planning ◽  
Drought Risk ◽  
The Face ◽  
Risk Uncertainty

Overstory treatment and planting season affect survival of replacement tree species in emerald ash borer threatened Fraxinus nigra forests in Minnesota, USA

2015 ◽  
Vol 45 (12) ◽  
pp. 1728-1738 ◽  
Author(s):  
Christopher E. Looney ◽  
Anthony W. D’Amato ◽  
Brian J. Palik ◽  
Robert A. Slesak
Keyword(s):  
Tree Species ◽  
Group Selection ◽  
Survival Rates ◽  
Emerald Ash Borer ◽  
Species Selection ◽  
Ecosystem Functions ◽  
Control Group ◽  
High Survival ◽  
Fraxinus Nigra ◽  
Black Ash

Fraxinus nigra Marsh. (black ash) wetland forests in northern Minnesota, USA, are threatened by the invasive insect, emerald ash borer (Agrilus planipennis Fairmaire (EAB)). A potential management option is promoting regeneration of tree species that are not EAB hosts to maintain ecosystem functions. Using an operational-scale field experiment, we examined the survival of 12 alternative tree species in response to different canopy treatments. We planted the seedlings in 1.6 ha plots assigned to four replicated canopy treatments: untreated control, group selection (0.04 ha gaps, 20% of stand), black ash girdling to emulate EAB-induced mortality, and clearcut. Fall and spring plantings were used to compare the effects of spring ponding. Control (32.9%), group selection (34.5%), and girdling (33.3%) treatments had comparable overall seedling survival. Survival in the clear-cut treatments was significantly lower (22%). Species selection, overstory treatment, and season of planting together resulted in survival rates ranging from 0.08% to 94.1%. Conifer species had low overall rates of survival (10.7%), whereas some species with native ranges not presently overlapping with northern F. nigra forests, e.g., Quercus bicolor Willd. (75.5%), had high survival rates. If growth is light-limited, group selection may be effective in promoting recruitment and supporting a larger variety of species.

scholarly journals KAJIAN POTENSI KOLEKSI POHON LOKAL KEBUN RAYA CIBODAS UNTUK FUNGSI ESTETIKA DALAM LANSKAP

2019 ◽  
Author(s):  
Muhammad Amin Shodiq ◽  
Tati Budiarti ◽  
Nizar Nasrullah
Keyword(s):  
Tree Species ◽  
Botanical Garden ◽  
Species Selection ◽  
Survey Method ◽  
Literature Study ◽  
Species List ◽  
Aesthetic Quality ◽  
Native Tree ◽  
Native Tree Species ◽  
The Aesthetic

Trees in the landscape have many important roles; one of them is aesthetics function. Therefore, tree species selection must be considered well. Indonesia has big number of tree biodiversity that can use for tree selection purposes. The selection can be considered based on physical characteristics and ecological characteristics of the tree species. Therefore, purposes of this study are 1) to identify ecological distribution of native tree species in Java island, 2) to identify native tree species which have high aesthetic value, and 3) to arrange native tree species list that have potential to be developed for aesthetic use in the landscape. This study conducted in Cibodas Botanical Garden. The method used for this research is literature study from Botanical Garden Catalogue, direct survey method, aesthetic analyze using Key Performance Index for aesthetic quality assessment. The results of this research is there are 223 Java Island native tree species collection in Cibodas Botanical Garden. The habitat of these collections of tree species is evenly distributed throughout the island of Java. Most can grow well in tropical zones (0-1000 masl) and tropical-mountain zones (0-2400 masl). Based on the aesthetic criteria assessment there are 50 species belonging to the good category, 101 species are included in the moderate category, and only one species is categorized as bad.

scholarly journals Pedogenic Threshold in Acidity Explains Context-Dependent Tree Species Effects on Soil Carbon

2021 ◽  
Vol 4 ◽  
Author(s):  
Ellen Desie ◽  
Bart Muys ◽  
Boris Jansen ◽  
Lars Vesterdal ◽  
Karen Vancampenhout
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Forest Soils ◽  
Tree Species ◽  
Litter Quality ◽  
Species Selection ◽  
Species Effects ◽  
Tree Species Effects ◽  
Soc Stocks ◽  
The Way

Despite the general agreement that maximizing carbon storage and its persistence in forest soils are top priorities in the context of climate change mitigation, our knowledge on how to steer soil organic carbon (SOC) through forest management remains limited. For some soils, tree species selection based on litter quality has been shown a powerful measure to boost SOC stocks and stability, whereas on other locations similar efforts result in insignificant or even opposite effects. A better understanding of which mechanisms underpin such context-dependency is needed in order to focus and prioritize management efforts for carbon sequestration. Here we discuss the key role of acid buffering mechanisms in belowground ecosystem functioning and how threshold behavior in soil pH mediates tree species effects on carbon cycling. For most forests around the world, the threshold between the exchange buffer and the aluminum buffer around a pH-H2O of 4.5 is of particular relevance. When a shift between these buffer domains occurs, it triggers changes in multiple compartments in the soil, ultimately altering the way carbon is incorporated and transformed. Moreover, the impact of such a shift can be amplified by feedback loops between tree species, soil biota and cation exchange capacity (CEC). Hence, taking into account non-linearities related to acidity will allow more accurate predictions on the size and direction of the effect of litter quality changes on the way soil organic carbon is stored in forest soils. Consequently, this will allow developing more efficient, context-explicit management strategies to optimize SOC stocks and their stability.

Tree species preferences of koalas (Phascolarctos cinereus) in the Campbelltown area south-west of Sydney, New South Wales

2000 ◽  
Vol 27 (5) ◽  
pp. 509 ◽  
Author(s):  
Stephen Phillips ◽  
John Callaghan
Keyword(s):  
Tree Species ◽  
Nutrient Status ◽  
Limiting Factors ◽  
Phascolarctos Cinereus ◽  
Factors Affecting ◽  
Faecal Pellets ◽  
South West ◽  
Independent Field ◽  
Preferred Species ◽  
Species Preferences

Tree species preferences of a koala population inhabiting a small area of forest and woodland in the Campbelltown area, south-west of Sydney, were investigated over a two-year period. In total, 2499 trees from 45 independent field sites were assessed, with tree species preferences determined on the basis of a comparative analysis of proportional data relating to the presence/absence of koala faecal pellets. The results established that grey gum (Eucalyptus punctata) and blue-leaved stringybark (E. agglomerata) were most preferred by koalas in the study area, but only when growing on shale-based substrates. The preferential utilisation of E. punctata and E. agglomerata on substrates derived from shales, compared with that recorded for the same species on sandstones, suggests that their use by koalas was influenced by differences in nutrient status between substrates. Regression analyses further identified a trend for use of at least one of the preferred species (E. punctata) to be more commonly associated with larger trees. Results are discussed in terms of their relevance to issues of resource availability and the need to reconsider, by way of a hierarchical approach, the use of food trees by koalas generally. The presence of E. punctata and E. agglomerata and their occurrence in conjunction with shale-based substrates are considered to be important limiting factors affecting the present-day distribution and abundance of koalas in the Campbelltown area.

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