GEOG 566

         Advanced spatial statistics and GIScience

Archive for April, 2017

April 30, 2017

Tutorial 1: An analysis of the spatial distribution of the North American deer mouse (Peromyscus maniculatus) in the Toiyabe mountain range, NV, USA.

Filed under: 2017,Tutorial 1 @ 10:07 pm

Background & Question The north American deer mouse (Paramyscus maniculatus) is the most widely distributed rodent species in north America and has the highest proportional abundance across many of the rodent communities in the Great Basin. Understanding its distribution in space is important for understanding its impact on the spatial arrangement of the rest rodent […]

April 28, 2017

Tutorial 1: Calculating Global Moran’s Index on Point Data

Filed under: 2017,Tutorial 1 @ 2:19 pm

A quick summary of my project and objectives: I am using a subset of the FIA (Forest Inventory and Analysis program run by the USFS) dataset, which is contained in a .csv file. I want to assess the understory vegetation response to ponderosa pine canopy cover and other environmental factors, and I am using USFS […]

Tutorial 1: Species Area Curves with Vegetation Community Data

Filed under: 2017,Tutorial 1 @ 1:58 pm

Salmon River Estuary: Map of study site and plot locations Species Area curves represent the relationship between a specified area of habitat and the number of species present there. Species-area curves are useful for comparing species richness data from sample units that differ in area, especially nested sampling plots. Empirically, the larger the area, the […]

Tutorial 1: Using variograms to assess patchiness in raster pixels for a single wildfire event

Filed under: 2017,Tutorial 1 @ 10:32 am

Overview: Question & Tool Often patch dynamics are examined under the lens of single disturbance events, but contemporary disturbance regimes are demonstrating that large-scale disturbances can overlap in time and space.  The spatial configuration of patches from an initial disturbance may influences the spatial configuration of patches of a sequential disturbance.  The broader research question […]

April 24, 2017

Japanese tsunami marine debris biota

Filed under: 2017,Final Project,My Spatial Problem @ 12:49 pm

  Research problem: Japanese Tsunami Marine Debris species Six years ago, the devastating Tohoku earthquake and tsunami struck the coast of Japan. Since then, it has become evident that hundreds of coastal species from Japan have crossed the Pacific Ocean on tsunami debris, including species that have become invasive and been known to cause ecosystem/economic […]

April 20, 2017

Exercise 1 Part 2: Assessing spatial autocorrelation of snowpack using semivariograms

Filed under: Tutorial 1 @ 10:50 am

Research Question For this exercise, I elected to compare the spatial autocorrelation of snow cover frequency (SCF) before and after the Grays Creek wildfire in central Idaho. Approach/tools used After trying out a few different tools, I decided to use ArcGIS to create semivariogram plots for my SCF data within the Grays Creek wildfire perimeter. […]

April 7, 2017

Topographic constraints on climate drive range shifts in Great Basin small mammals

Filed under: My Spatial Problem @ 8:55 pm

A description of the research question that you are exploring. In 2015, Elsen and Tingley published “Global mountain topography and the fate of montane species under climate change,” in the journal Nature – climate change. They combined two data sets, the global data set of mountain ranges from Natural Earth’s physical vectors and a high-resolution […]

Socio-Demographic and People’s Intentions Relationship in a Neighborhood System Adapting to Floods

Filed under: 2017,My Spatial Problem @ 1:58 pm

Research question. For this problem I want to answer: How socio-demographic and spatial variables explain patterns of survey responses about attitudes regarding flood-safety in neighborhoods?   Description of the dataset. The dataset for the study has the following characteristics: Data is obtained from Household voluntary survey Convenience sampling. Households located within the 100 and 500 […]

Spreading of Red Blotch disease in vineyards

Filed under: 2017,My Spatial Problem @ 1:37 pm

Introduction Spatial patterns in disease spreading in agriculture are important to understand. For example, what causes the infection and how to avoid further spreading. In this project, we focus on the Red Blotch virus in vineyards located in Oregon. Red Blotch affects the sugar content in the grapes, which changes the taste of the produced […]

Stream Geomorphic Change Detection and Analysis in an Oregon Coast Range Basin

Filed under: My Spatial Problem @ 1:07 pm

Introduction My master’s thesis involves quantifying geomorphic change in streams after the addition of a large wood jam for salmon habitat restoration purposes. Large wood has been shown to have many positive effects on salmon habitat, including creating pools and backwater areas that are essential for juvenile salmon survival. This past summer, I surveyed seven […]

Comparison of near-shore and on-shore predictions of tsunami inundation

Filed under: Final Project,My Spatial Problem @ 1:06 pm

Research Question A tsunami is a set of ocean waves caused by any large, abrupt disturbance of the sea surface. As evidenced by the 2004 Indian Ocean and 2011 Japan tsunamis, local tsunamis can destroy coastal communities in a matter of minutes. Tsunamis rank high on the scale of natural disasters. Since 1850 alone, tsunamis […]

REVISED: Spatial Relationships of Vegetation in Restored and Remnant Salt Marshes, Salmon River Estuary, Oregon

Filed under: My Spatial Problem @ 12:56 pm

My Spatial Problem Blog Post Contents: A description of the research question that you are exploring. Salmon River is one of the smallest estuaries on the northern Oregon coast (800 ha), with the largest proportion of tidal marsh (400 ha) for any Oregon estuary. It borders Tillamook and Lincoln counties, and is designated as an […]

Habitat use of blue whales New Zealand’s industrial South Taranaki Bight region

Filed under: My Spatial Problem @ 12:44 pm

Research objectives My research focuses on the ecology of blue whales (Balaenoptera musculus brevicauda) in New Zealand’s South Taranaki Bight region (STB). Despite the recent documentation of a foraging ground in the STB (Torres et al. 2015), blue whale distribution remains poorly understood in the southern hemisphere. The STB is New Zealand’s most industrially active […]

Nitrate Abundance in 10 Oregon Watersheds as linked to percentage of Red Alder Forest Cover

Filed under: My Spatial Problem @ 11:31 am

Research Description I am exploring aquatic chemistry among 10 streams in the Oregon Coast range. I am running anion analysis over the period of 1 year, sampling monthly. These streams are divided into three categories, three are located East of Mary’s Peak in the Rock Creek Watershed, three near the top of Mary’s peak (highest […]

Patch dynamics for short-interval disturbances of beetle outbreak and wildfire

Filed under: My Spatial Problem @ 11:05 am

Research Question What controls high-severity patch size during wildfire when landscape have large portions of dead forest from a prior disturbance of beetle outbreak? Background Fire is a complex landscape process that is controlled by the heterogeneity of vegetation/fuels, topography, and weather.  The landscapes created by fire may dictate forest structure and function for decades. […]

Addressing Spatial Patterns in Multispectral Imagery of SW White Pine Seedlings Grown in Common Garden Boxes

Filed under: 2017,Final Project,My Spatial Problem @ 8:49 am

1. The research question I explored in GEOG 566 is: “What relationship do spectral reflectance signatures of southwestern white pine (P. strobiformis) seedlings in common garden boxes have with box number and distance from center of box?” Another way to word the question is : “How do spectral responses differ with the boxes that seedlings are grown […]

Sensitivity of Forest Structure Parameters Estimation to Unmanned Aircraft System (UAS) Data Processing Algorithms

Filed under: 2017,My Spatial Problem @ 12:40 am

Background: The emission of Carbon Dioxide (CO2) is one of the greatest factors causing climate change. Forests, as the largest terrestrial carbon reservoir have an important role to reduce CO2 emissions and to prevent climate change. Considering the important role of forests to reduce CO2 emissions and prevent climate change, it is necessary to manage […]

April 6, 2017

Evaluating interspecific competition between wolves and cougar in northeast Oregon

Filed under: My Spatial Problem @ 3:36 pm

Background & Research Question(s) The research I am conducing is focused on understanding and quantifying the competitive interactions between two apex predators, wolves and cougar. Populations of large carnivores have been expanding across portions of their historical range in North America, and sympatric wolves (Canis lupus) and cougars (Puma concolor) share habitat, home ranges, and […]

Amphibian Disease in the Cascades Range, OR

Filed under: My Spatial Problem @ 1:06 pm

Carson Lillard My Spatial Problem 4-6-17 Description Ranavirus (Rv) and chytrid fungus (Bd) are both deadly pathogens that infect amphibian hosts all over the world. Amphibian die-offs associated with both pathogens have occurred throughout North America, but not much is known about ranavirus in Oregon due to most research being concentrated on Bd. I plan […]

An investigation into the correlation between snowpack and post-wildfire forest greening.

Filed under: 2017,Final Project,My Spatial Problem @ 10:14 am

Research Question My spatial question looked into the relationship between winter snowpack and re-vegetation following a severe wildfire. I used variograms and binned scatter plots to characterize this relationship in a visual manner. Datasets To estimate snowpack, I used our research group’s new snow cover frequency (SCF) product, which uses satellite reflectance data from the […]

April 5, 2017

Final Project

Filed under: 2017,Final Project @ 8:16 pm

This is the blog page for Spring 2017 Final Project posts

Tutorial 3

Filed under: 2017,Tutorial 3 @ 8:15 pm

This is the blog page for Spring 2017 Tutorial 3 posts

Tutorial 2

Filed under: 2017,Tutorial 2 @ 8:15 pm

This is the blog page for Spring 2017 Tutorial 2 posts

Tutorial 1

Filed under: 2017,Tutorial 1 @ 8:15 pm

This is the blog page for Spring 2017 Tutorial 1 posts

My Spatial Problem

Filed under: 2017,My Spatial Problem @ 8:01 pm

This is the blog page for Spring 2017 – My Spatial Problem posts

Hello world!

Filed under: Uncategorized @ 7:12 pm

Welcome to This is your first post. Edit or delete it, then start blogging!

Using radar to quantify water in forests

Filed under: 2017,My Spatial Problem @ 1:54 pm

My research focuses on using radar measurements to isolate the water content of a landscape. This will involve comparing measurements taken during wet periods and dry periods, and comparing the backscatter. The areas of interest will mostly be single-age monoculture forest stands, for simplicity in isolating backscatter due to trees (branches, trunks, etc.) from backscatter […]

Assessing Ponderosa Pine Plantations in the Willamette Valley

Research Question My research explores the extent and distribution of ponderosa pine (Pinus ponderosa) plantations in the Willamette Valley, and the understory plant communities associated with them. In this class, I will be substituting my own field data with FIA (forest inventory and analysis) data collected by the USFS. The data I am collecting and assessing […]

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