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,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 10, 2017

Assessment of Ecohydrologic Dynamics of the Mill Creek Municipal Watershed

Filed under: 2017,My Spatial Problem @ 7:14 pm

Introduction: The overall objective of my M.S. Thesis research is to disentangle the potential effects of water diversions, forest management, and climate change on the hydrology of the Mill Creek watershed, a transboundary catchment straddling the Eastern Oregon and Washington border. Since 1989, 8,798 hectares of the headwaters of this catchment have co-managed by the […]

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 […]

Spatial Relationships of Tsunami Prediction Data for Data Assimilation Use

Filed under: My Spatial Problem @ 1:06 pm

My Spatial Problem Blog Post A description of the research question that you are exploring. The primary objective of my work in this course is to obtain spatial correlation structures in simulated tsunami prediction data. These correlation structures are needed to implement a data assimilation procedure which will be used for risk and uncertainty analysis. […]

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 (254 acres), with the largest proportion of tidal marsh (68%) for any Oregon estuary. It borders Tillamook and Lincoln counties, and is designated as an Important […]

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. […]

Integrating Mobile and UAV-based Lidar Point Clouds to Estimate Forest Inventory

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

1. The research question I’m exploring is: “What is the relationship do spectral reflectance signatures (across 5 multispectral bands) of southwestern white pine (P. strobiformis) seedlings in common garden boxes have with seedling position within the boxes or position within the plots?” 2. My raw data consist of 500 photos taken from a UAV of common […]

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 of post-wildfire forest greening dependence on snowpack.

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

Research Question My spatial question involves the relationship between winter snowpack and the following summer’s forest greening following a severe wildfire. Specifically, I would like to conduct a multivariate regression to see how important snowpack is to revegetation following wildfires in the Columbia River Basin, with other variables including summer precipitation, soil texture, and elevation. […]

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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