Biodiversity Phenology

 There are many ways to explore biodiversity using iNaturalist.  One way to study the biodiversity of a geographic area is with phenology:  the science of when things happen.

For example, it is possible to modify the search URL to find observations of plants within 100 km of Dublin, OH, to search for specific months.  The count of observations for each species give some idea of their abundance in that month.

Central Ohio's most common flowering plants in March.

Central Ohio's most common flowering plants in April.

It is interesting to note that the number of observations for e.g. Bloodroot (Sanguinaria canadensis) increase from March to April, but its relative abundance appears to decrease as Dutchman's Breeches (Dicentra cucullaria), Trout Lilies (Erythronium americanum) and other species are photographed much more in April.

Where is most biodiverse?

 iNaturalist can be used to compare biodiversity in different locations.  

To do this, it is important to allow for different search effort in different areas: for example, a search of the middle of the Amazon might not return many species, not because there aren't many, but because people haven't observed them.

For the U.S., we will assume that search effort is at least somewhat comparable.  We will also look at total observations and divide them by total species to get some idea of the effort required to document a new species in that area.

We decided to investigate my home town in Washington State, Alexandra's home town in Ohio, one of our favorite places: Maui, and our current home in Arizona.

Port Orchard, WA

A 100 km search radius includes most of Puget Sound, the Olympic mountains, and Seattle.

Dublin, OH

A 100 km search radius includes most of central Ohio creeks, woodlands, agricultural lands, and all of Columbus OH.

Prescott, AZ

A 100 km search radius includes canyons and mountains between Flagstaff and Phoenix.

Maui, HI

A 100 km search radius includes all of Maui as well as ocean channels and nearby islands.

Summary Table

According to this analysis, Washington is most biodiverse, followed by Ohio, then Arizona, and in last place is the island paradise of Maui.  

Island biogeography teaches that islands, although unique for their level of endemic plants and animals, should be deficient in overall biodiversity if there hasn't been enough time for biodiverse taxa to colonize or evolve on the island.  This seems to be the case with Maui, which is especially depauperate in insects, given its tropical location.

Arizona, despite its diverse environments, is significantly lacking in Fungal diversity, which could be due to the arid climate.

The American Midwest, with its perfect seasonal growing climate, is remarkably biodiverse, and would probably surpass Washington if this search had included a more varied part of the Midwest with more mountains and/or rivers and lakes.

Washington tops the list as most biodiverse, probably because of the presence of diverse environments, with everything from alpine mountain tops to ocean kelp forests, and everything in between.  This is despite the lower number of insect species compared to a lower latitude place like Ohio.

A caveat to this entire analysis is revealed by the Total Observations in each area and the resulting Observations per Species.  While I had assumed that search effort would be equivalent across the US, it is evident that many more people are using iNaturalist around major cities like Seattle and Columbus.  Arizona is more sparsely populated and has many less observations, and Maui, despite the huge numbers of tourists, is even less populated.  This means that is only takes 20 or 27 new observations (on average) to observe a new species in Maui and Arizona, respectively, while it takes 47 or 72 new observations in Ohio and Washington, respectively, to observe a new species.  So even though Washington has the most observed biodiversity in iNaturalist, it may be easier to find new, previously-unobserved biodiversity in Maui or Arizona.

Ohio Agricultural Production

Ohio agricultural production has declined, so why hasn't fertilizer pollution?

Nutrient Pollution Management in 2011: New Regulations

Dr. Larry Antosch, Senior Director, Program Innovation and Environmental Policy, Ohio Farm Bureau Federation presented "Water Quality and Agricultural Nutrient Management – Many Forces Converge" to finish up the seminar series theme of Water Quality here in the School of Environment and Natural Resources. Dr. Antosch is well-placed to provide a comprehensive and up-to-date view of nutrient management and water quality, having worked in the field for 30 years, first for the EPA and now for the FBF, which recently sued the EPA over pending nutrient restrictions in the Chesapeake Bay (CB) watershed. Dr. Antosh pointed out that since Ohio is in the CB "airshed" (some of our air pollution is deposited in the CB watershed) these regulations could impact us directly. They could also impact Ohio indirectly as EPA gears up for an even bigger watershed nutrient reduction program for the entire Mississippi.

In Dr. Antosh's opinion, some of the regulatory impetus is misplaced, because science does not have all the answers yet. For example, the increased of dissolved Phosphorous (rather than particulate phosphorous) entering Lake Erie and causing harmful algal blooms, is a mystery. Farmers or cities? Which techniques could best eliminate excess nutrients? Some have even pointed to no-till as a possible source, because nutrients are applied to the surface rather than mixed in.

Although Dr. Antosch emphesized the uncertain nature of water quality science, I believe there is enough information to act today. Several simple examples come to mind: (1) Regulations against applying manure and fertilizer in the winter, when plants are not growing and hence don't absorb any of the nutrients; (2) Existing steps to eliminate phosphorous fertilization of residential lawns; (3) Creating new wetlands to filter the runoff that does occur.

Columbus, Ohio: Leading Edge of EAB Invasion

http://www.na.fs.fed.us/fhp/fhw/lsfhw/2006/10_06/10_06.htm

Best Graph of 2009

source: http://www.dispatch.com/live/content/local_news/stories/extras/2009/2009-weather-table.html

Adaptive Nitrogen Management

Harold M. van Es, Cornell University Department of Crop and Soil Sciences, Soil Health

Dr. van Es introduced his team's effort at a comprehensive, quick, and cheap soil test that goes beyond the standard chemical measurements to include physical and biological properties as well. I would like to see a paper showing how much variation in yield (b/c that is the output variable of interest to farmers) this test can account for, compared to other more comprehensive tests or even expert in-field evaluation.

Dr. van Es than discussed his work creating an adaptive nitrogen management tool that would completely bypass soil tests. His on-line tool uses rainfall patterns to estimate loss of nitrogen from corn fields and than recommends how much "booster" N to add. The benefits include less overall use of N. Interestingly, the loss of N in wet weather is exacerbated in soils with high organic carbon because of increased decomposition rates, according to Dr. van Es. Unfortunately, he did not discuss the dynamics of N under alternative farming (no synthetic fertilizer, no-till with cover crops, etc) practices that could obviate the need to even add N. I realized that one thing that's nice about monoculture corn across most of the mid-West is that the standardization makes it easier for science research to be relevant to a lot of people. It would be harder for Dr. van Es to research all the different alternative management techniques and apply recommendations for adaptive management to each.

The reason for internet-based adaptive management is a lack of real-time on-the-ground data on, say, soil moisture levels, N content, etc. But this is changing and Dr. van Es did show a few slides about what may be the future, with combines and irrigation equipment festooned with hi-tech spectrometers to gauge how much N plants have. The technique has been shown to be successful with wheat, but is still being developed on other crops.

Some links:

Sustainable Agriculture Research and Education

Alternative Farming Systems Information Center

The Ohio Country

East of the Appalachian Mountains, East and North of the Ohio River, and South of Lake Erie, lies a rich country of farms and forest. It is my new home. I think Michael Pollan's description of a farm in Virginia could equally describe Ohio:

"The wail of farm machinery had fallen silent, and in the space it left I could hear the varied sounds of birds: songbirds in the trees, but also the low gossip of hens and the lower throat singing of turkeys. Up on the green, green shoulder of hill rising to the west I could see a small herd of cattle grazing, and, below them on a gentler slope, several dozen portable chicken pens marching in formation down the meadow. Laid before me was, I realized, a scene of almost classical pastoral beauty -- the meadows dotted with contented animals, the backdrop of woods, a twisting brook threading through it all...."