Allocasuarina Venticillata Essay

Similar information has been explored in different studies. A previous study conducted showed that trees with smaller DBHs and greater canopy coverage allowed for an increase in species richness (Rannius T 2000). Furthermore, researchers have found that saplings across different species like the sugar maple exhibit greater growth in open canopies than saplings that are in closed canopies (Canndam C. 1998). Although these studies are important, the relationship between canopy size and DBH is still yet to be explored. In response to this lack of knowledge, we have conducted a study to further explore this correlation. Our hypothesis is that the larger the DBH size, the greater the amount of canopy coverage in a given area for the tree being studied.

Every forest has a story to tell. By looking closely at its habitants, that story can be interpreted. Much of this narrative is written in the trees: their age, their tolerance to shade, and the rate at which they grow are all characteristics that can imply a lot about their environment. Exploring these relationships and how they connect with each other can indicate the health and history of the land. Heiberg Forest, located in northern New York, was once used for agricultural purposes in the 1800-1900’s. (Nowak, Lecture Notes) Much of the land once used for farming was left to regrow back into a young forest. The life history of different tree species can be determined by examining the most common species in Heiberg.

The annual rate of precipitation, and elevational range once generated a strong foundation for a wide diversity of vegetation

The topography of the island is also of note. The west end of the island features a closed-canopy forest with more hardwood trees. The east end of the island is better characterized as a “boreal forest,” a term used to describe regions that are mostly covered by coniferous forests. It is good to note that the balsam fir is found on both ends of the island, but that samples used in the study from the west end of the island were, on average, older, but shorter, than those samples found on the east side of the island.

Located between the Academic building and Bolton Hall on the campus of Texas A&M University there can be found the species Quercus Virginiana. This live tree known to the university as the century tree is located among central campus much like the species of Quercus Virginiana which can be found throughout central Texas. Located on page 112 can be found a map depicting Texas climate and correlation of vegetated live oak in particular climatic zones.

Looking further into the impacts of the Rodeo-Chediski fire the trees saw the greatest impact of the fire. Almost 90% of the trees suffered complete crown kill (Ffolliott, 2008). Either some trees had survived with low severity, were harmed, or dead because of the drought and the fire combined. Even though some of the trees that had faced high severity apparently after having seen what trees had survived the fire yet by 2004 two years after the fire they had died (Ffolliott, 2008). The wildfire also impacted the standardization structure, post-fire mortality of trees, and stocking of tree reproduction on the Steamer Ridge Watershed (Ffolliott, 2008). After the fire had finally been contained the density of the forest had been forever changed.

The Acadian forest in Canada takes up 12.1 million hectares, and can be distinguished from other parts of Canadian forests by its location in the lowlands and deep valleys and by its mixed hardwood and softwood composition. The position of these trees in deep valleys isolates them from other forests, and limits their ability to further naturally spread their population geographically, and causes them to be more significantly impacted by disturbances. The Acadian forest region covers the Canadian provinces of Prince Edward Island, Nova Scotia, and New Brunswick, with a rich diversity of plant and animal species consisting of many shade-tolerant trees and lichens. Yet these shade-tolerant trees are slowly transitioning into small seedlings as logging practices abolish old trees. The old-growth hardwood population in specific provides critical habitats for animal species though these trees are declining in numbers due to extensive logging. With the declining old-growth trees, the number of critical habitats will also decline and animal species will most likely die out. These regions are affected by climate change at the same time, which increases the vulnerability of Acadian biodiversity.

This region is “heavily influenced by natural disturbances”. Species here have adapted to large wildfires; some, including the jack pine and black spruce, require these fires to reproduce. Heat is needed to release their seeds, and seed germination only occurs in favourable conditions produced by the fires.

We also had a measuring tape and measured up to 25 meters and cut into several parts at each 5 meters leaving in middle 10 meter between both areas of interest or between two different groups working. We were divided into two different groups, one working on low latitude and the other group working on high latitude and repeated the same thing on both side of the mountain. After cutting transect, we recorded each plant species we saw at the field and made some approximation of grasses in percent based on area

White oak trees can reach heights upward of sixty five to eighty five feet and the tallest was one hundred and forty four feet. As the trees get taller their canopy extends out farther and many branches at the bottom of the tree are run horizontally to the ground. The base of the tree grows to a large diameter which makes a great base for the large tree.

The reading claims that the numbers of the yellow cedar in America have been decreased since 1880. However, the lecturer finds all ideas dubious and presents some evidence to refute them all.

Even when cut down, the Sawtooth Oak has the characteristic of shooting from the stump and re-growing in 15 years, and

Percent cover of both Megathyrus maximus and Senna surattensis is estimated using quadrats on 11 separate plots along Wa’ahila Ridge. Percent cover of these two plant species were compared to the measured elevation using a GPS, in each plot. A p-value greater than .005 for each indicates a lack of significance between elevation and percent cover. A correlation analysis was used to determine that there is no significance between the elevation and percent cover as M. maximus had a p-value of .873 and S. surattensis had a p-value of .380. Sample size

David Guillet has discovered that mountain adaptations have three basic elements. First, a wide variety of vertical production zones is necessary. Each zone is characterized by a complex interaction of variables including agricultural selection, social

Our lab investigated the morphological characteristics of leaves found in the sun and shade on various species of maple and oak trees around campus. Our null hypothesis was Acer and Quercus acclimate similarly with regards to SLW (specific leaf weight), size, and sinuosity. Our hypothesis was Quercus acclimation is greater than Acer SLW, size, and sinuosity. We tested these hypotheses by picking small sections of a branches from both maple and oak trees. A group was assigned either a maple or an oak tree, and needed a total of three different trees per group. Once three different trees were chosen, groups needed three shade leaves and three sun leaves of off each different tree. In total, each group should then end up with 18 leaves for testing. After collecting the leaves, we ran them through the LiCor 3100 leaf area meter to identify the area of each leaf. Major results found by the classes’ mutual data was each one of our p-values were greater than .05. This means that we failed to reject the null hypothesis. Thus, the lab results do not support our hypothesis that Quercus acclimation is greater than Acer SLW, size, and sinuosity.