Constituent databases and data stewards in the Neotoma Paleoecology Database: History, growth, and new directions

Grimm, Eric C.; Blois, JL; Giesecke, Thomas; Graham, RW; Aj, Smith; Jw, Williams

doi:10.22498/pages.26.2.64

Cited by 10 publications

(8 citation statements)

References 8 publications

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“…All data generated from this study will be openly available via the African Pollen Database (Vincens et al, 2007), a constituent of the Neotoma Paleoecology Database and data repository (Grimm et al, 2018;Williams et al, 2018).…”

Section: Data Accessibilitymentioning

confidence: 99%

Late Pleistocene and Holocene Afromontane vegetation and headwater wetland dynamics within the Eastern Mau Forest, Kenya

Githumbi

Mustaphi

Marchant

2021

J Quaternary Science

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The Mau Forest Complex is Kenya's largest fragment of Afromontane forest, providing critical ecosystem services, and has been subject to intense land use changes since colonial times. It forms the upper catchment of rivers that drain into major drainage networks, thus supporting the livelihoods of millions of Kenyans and providing important wildlife areas. We present the results of a sedimentological and palynological analysis of a Late Pleistocene-Holocene sediment record of Afromontane forest change from Nyabuiyabui wetland in the Eastern Mau Forest, a highland region that has received limited geological characterization and palaeoecological study. Sedimentology, pollen, charcoal, X-ray fluorescence and radiocarbon data record environmental and ecosystem change over the last~16 000 cal a BP. The pollen record suggests Afromontane forests characterized the end of the Late Pleistocene to the Holocene with dominant taxa changing from Apodytes, Celtis, Dracaena, Hagenia and Podocarpus to Cordia, Croton, Ficus, Juniperus and Olea. The Late Holocene is characterized by a more open Afromontane forest with increased grass and herbaceous cover. Continuous Poaceae, Cyperaceae and Juncaceae vegetation currently cover the wetland and the water level has been decreasing over the recent past. Intensive agroforestry since the 1920s has reduced Afromontane forest cover as introduced taxa have increased (Pinus, Cupressus and Eucalyptus).

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Section: Data Accessibilitymentioning

confidence: 99%

Late Pleistocene and Holocene Afromontane vegetation and headwater wetland dynamics within the Eastern Mau Forest, Kenya

Githumbi

Mustaphi

Marchant

2021

J Quaternary Science

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“…Reconstructions of past ecoregion distributions have improved dramatically with the advent of paleoecological databases such as the North American Pollen Database (NAPD), FAUNal MAP (FAUNMAP), and the Neotoma Paleoecology Database, the latter of which now serves as the primary repository for pollen data in the Western Hemisphere and has partially subsumed the two former (Grimm et al 2018). These massive efforts provide access to thousands of contributions from individual researchers and make it possible to stitch records together over landscape and subcontinental scales and from glacial to modern time periods.…”

Section: Introductionmentioning

confidence: 99%

Ragweed and sagebrush pollen can distinguish between vegetation types at broad spatial scales

et al. 2020

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Patterns of vegetation distribution at regional to subcontinental scales can inform understanding of climate. Delineating ecoregion boundaries over geologic time is complicated by the difficulty of distinguishing between prairie types at broad spatial scales using the pollen record. Pollen ratios are sometimes employed to distinguish between vegetation types, although their applicability is often limited to a geographic range. The Neotoma Paleoecology Database offers an unparalleled opportunity to synthesize a large number of pollen datasets. Ambrosia (ragweed) is a genus of mesic-adapted species sensitive to summer moisture. Artemisia (sagebrush, wormwood, mugwort) is a genus of dry-mesic-adapted species resilient to drought. The log pollen ratio between these two common taxa was calculated across the North American midcontinent from surface pollen samples housed in the Neotoma Paleoecology Database. The relative proportion of Ambrosia has roughly doubled since European settlement, likely due to widespread disturbance, while Artemisia proportions are nearly unchanged. Correcting surface samples for the disturbance signal in modern Ambrosia proportions will allow Ambrosia, a strong indicator of summer moisture, to be more accurately represented. In surface samples where both Ambrosia and Artemisia are reported as nonzero proportions of the pollen sum, mean annual precipitation explains approximately 78% of the variation in the log Ambrosia-to-Artemisia ratio. Application of this model to Little Ice Age pollen samples produces precipitation reconstructions which generally agree with reconstructions from independent nonpollen proxies. In addition, we find that modern ecoregions within the North American midcontinent can be successfully distinguished from one another using the log Ambrosia-to-Artemisia ratio. These relationships can improve reconstructions of past climate and improve delineation of past ecoregion boundaries.

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“…Aquatic organisms were sampled from the catch-and-release area on the Taylor River ( Figure C-2), just below Taylor Park Reservoir, approximately 22 km northeast of Almont, CO, USA. This site was chosen because (1) it is a tailwater fishery with relatively constant seasonal water temperatures and is accessible year-round (we conducted sampling in February when most other water bodies in the area were frozen over), (2) it is not a highly productive ecosystem, so is relatively depauperate and capturing a high proportion of its biodiversity was likely, (3) it is in close proximity (~50 km) to Western Colorado University campus where students engaging in the exercise were enrolled, (4) it is a popular sport fishery that many Western Colorado University students are familiar with and excited to learn more about.…”

Section: Site Selectionmentioning

confidence: 99%

“…One sample was omitted from further analysis because it did not meet the minimum size requirements, and others collected by different groups were pooled to ensure minimum size requirements were met as well as to reduce costs. Thus, a total of 19 samples were submitted for stable isotopes analyses at ISU's SIPERG Laboratory, and those results are provided herein (Table C- 2). In brief, corrected δ 13 C ranged from −17.54‰ to −29.51‰, and corrected δ 15 N ranged from 8.41‰ to 49.26‰ (Table C- answer questions pertinent to the analytical steps they were taking with high levels of success (Table C-).…”

Section: Data Accessibility Statementmentioning

confidence: 99%

“…A large, global, and highly active community of researchers contribute to an ever-growing body of knowledge. Much of this knowledge has been made readily accessible by the advent of the Neotoma Paleoecology Database [1] and its constituent databases, including the North American Pollen Database [2]. Neotoma holds well over 3,000,000 pollen records [1] representing over 8,000 individual datasets.…”

Section: Introductionmentioning

confidence: 99%

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Late Quaternary paleoecology of the North American midcontinent

Carroll¹

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Constituent databases and data stewards in the Neotoma Paleoecology Database: History, growth, and new directions

Cited by 10 publications

References 8 publications

Late Pleistocene and Holocene Afromontane vegetation and headwater wetland dynamics within the Eastern Mau Forest, Kenya

Late Pleistocene and Holocene Afromontane vegetation and headwater wetland dynamics within the Eastern Mau Forest, Kenya

Ragweed and sagebrush pollen can distinguish between vegetation types at broad spatial scales

Late Quaternary paleoecology of the North American midcontinent

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