Land use and ostracod community structure

Abstract

Ostracods are important members of the benthos and littoral communities of lake ecosystems. Ostracods respond to hydrochemistry (water chemistry) which is influenced by climatic factors such as water balance, temperature, and chemicals in rainfall runoff from the land. Thus, at local scales, environmental preferences of ostracods and characteristics of lakes are used to infer changes in climate, hydrology, and erosion of lake catchments. This study addresses potential drivers of ostracod community structure and biodiversity at multiple spatial scales using NMS, CART Ò , and multiple regression models. We identified 23 ostracod species from 12 lake sites. Lake area, maximum depth, spring conductivity, chlorophyll a, pH, dissolved oxygen, sedimentary carbonate, and organic matter all influence ostracod community structure based on our NMS. Based on regression analysis, lake depth, chlorophyll a, and total dissolved solids best explained ostracod richness and abundance. Land uses are also important community structuring elements that varied with scale; locally and regionally agriculture, wetlands, and grasslands were important. Nationally, using regression tree analysis of lakes sites in the North American Non-marine ostracod database (NANODe), row-crop agriculture was the most important predictor of biodiversity. Low agriculture corresponded to low species richness but greater landscape heterogeneity produced sites of high ostracod richness.

Dynamics of Ostracoda (Crustacea) assemblages in a Mediterranean pond system (Racó de l'Olla, Albufera Nat. Park) with focus on the exotic speciesCandonocypris novaezelandiae(Baird, 1843)

“…However, dispersal is not the only factor that determines the distribution and abundance of species. Once organisms have arrived to a particular wetland, the major variables influencing the colonization process are the habitat characteristics that can affect the structure of benthic ostracod communities (Poquet et al, 2008;Allen and Dodson, 2011). Eutrophication and salinity changes may influence community dynamics (Wetzel, 1983;Hargrave, 1991) and particularly ostracod species composition .…”

Microbiotic signatures of the Anthropocene in marginal marine and freshwater palaeoenvironments

“…Candonids such as Candona ohioensis and Candona crogmaniana may be more tolerant of human impacts (Allen & Dodson 2011), although a decrease in C. ohioensis in Illinois may be caused by seasonal anoxia driven by agricultural land use and lake development (Curry & Filippelli 2010).…”

Nonmarine Ostracoda as proxies in (geo‐)archaeology — A review

“…Many environmental factors can be evaluated and reconstructed based on (sub)fossil ostracods. These are salinity (e.g., Frenzel et al, 2010; Mischke, Almogi‐Labin et al, 2014; Mischke et al, 2007) and water chemistry (e.g., De Deckker & Forester, 1988; Mischke et al, 2012; Wansard & Mezquita, 2001), water and air temperature (e.g., Horne et al, 2012a; Pint, Schneider et al, 2017; Viehberg, 2006), precipitation/evaporation balance via lake‐level reconstruction (e.g., Alivernini et al, 2018; Mischke et al, 2005; Pérez et al, 2011), organic pollution and oxygen deficiency (e.g., Boomer & Attwood, 2007; Mezquita et al, 1999; Rosenfeld & Ortal, 1982), habitat structure and disturbance (Higuti et al, 2010; Malmqvist et al, 1997; Marmonier et al, 1994), turbulence of the ambient water (e.g., Boomer et al, 2003), land use effects and sedimentation rate (e.g., Allen & Dodson, 2011; Cohen, 2000), tsunamis and storm floods (e.g., Engel et al, 2013), periodicity of a water body or spring proximity (e.g., Pint et al, 2015).…”