Vegetation Patterns in and among Pannes (Calcareous Intradunal Ponds) at the Indiana Dunes National Lakeshore, Indiana

Hiebert, Ronald D.; Wilcox, Douglas A.; Pavlovic, Noel B.

doi:10.2307/2425735

Cited by 8 publications

(2 citation statements)

References 9 publications

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“…Aquatic invertebrate species are sensitive to changes in pH and positive relationships between pH and species richness have been reported in streams (Townsend et al, 1983). Our range in pH was small, attributed to the buffering capacity of limestone underlaying sand dunes (Hiebert et al, 1986), and the influence of surrounding vegetation and aquatic macrophytes. In a study along the German Baltic coast, dune vegetation species richness and diversity were highest at intermediate levels of soil pH and intermediate levels of plant cover (Isermann, 2005).…”

Section: Discussionmentioning

confidence: 82%

Local environmental conditions influence species replacement in Great Lakes interdunal wetland macroinvertebrate communities

Stewart

Schriever

2022

Freshwater Biology

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Understanding the role of environmental filtering and spatial processes along environmental gradients in assembling and maintaining aquatic communities in rare habitats is crucial for land management and biological conservation. We investigated the relative roles of environmental and spatial factors influencing beta (β) diversity of aquatic macroinvertebrate assemblages in 36 interdunal wetlands from five freshwater sand dune areas across two ecoregions spanning the latitudinal gradient of Lake Michigan. We hypothesised that aquatic macroinvertebrate diversity and composition would vary along the coastline because of an underlying environmental gradient. We predicted high species replacement correlated with environmental (local and regional) conditions and increasing species diversity with decreasing latitude. We calculated sample completeness, obtained diversity estimates based on Hill numbers and used abundance‐based β partitioning and multivariate analysis to examine β diversity, and its replacement and nestedness components in relation to local and regional predictors. Despite a short latitudinal gradient, we detected a significant increase in species richness with decreasing latitude, underpinned by a strong temperature and precipitation gradient. Species replacement (balanced variation in abundance) was high at all spatial scales (wetland, dune area, ecoregion and coastline), and correlated with local and regional environmental variables. Community dissimilarity showed no marked increase with spatial extent, which suggests a system where local‐scale environmental filtering prevents dispersal driven homogenisation. Both local and bioclimatic factors were correlated with aquatic macroinvertebrate dissimilarity, but local factors played a larger role. This study simultaneously examined the response of alpha and β diversity to geographical and environmental variables. Our results indicate that macroinvertebrates respond to abiotic factors by tracking suitable environmental conditions among locally variable interdunal wetlands. Thus, high dispersal along the coastline conveys resiliency to a hydrologically dynamic wetland system, which allows aquatic macroinvertebrates to contribute an integral portion of sand dune biodiversity within the Laurentian Great Lakes region. The high species turnover found suggests that conservation strategies should consider coastline connectivity among dune areas to maintain freshwater biodiversity.

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Section: Discussionmentioning

confidence: 82%

Local environmental conditions influence species replacement in Great Lakes interdunal wetland macroinvertebrate communities

Stewart

Schriever

2022

Freshwater Biology

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“…These bowl-shaped, flatbottomed basins, called pannés, originate when blowouts are excavated by the wind down to the water table. Several rare plant species characteristic of the modern pannés, such as Sabatia angularis, Buchnera americana, and Hypericum kalmianum (Hiebert et al 1986), are still present within the prairie.…”

Section: Study Areamentioning

confidence: 99%

Past and current trends of change in a dune prairie/oak savanna reconstructed through a multiple‐scale history

Cole

Taylor

1995

J Vegetation Science

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Abstract. The history of a rapidly changing mosaic of prairie and oak savanna in northern Indiana was reconstructed using several methods emphasizing different time scales ranging from annual to millennial. Vegetation change was monitored for 8 yr using plots and for 30 yr using aerial photographs. A 20th century fire history was reconstructed from the stand structure of multiple‐stemmed trees and fire scars. General Land Office Survey data were used to reconstruct the forest of A.D. 1834. Fossil pollen and charcoal records were used to reconstruct the last 4000 yr of vegetation and fire history. Since its deposition along the shore of Lake Michigan about 4000 yr ago, the area has followed a classical primary dune successional sequence, gradually changing from pine forest to prairie/oak savanna between A.D. 264 and 1007. This successional trend, predicted in the models of Henry Cowles, occurred even though the climate cooled and prairies elsewhere in the region retreated. Severe fires in the 19th century reduced most tree species but led to a temporary increase in Populus tremuloides. During the last few decades, the prairie has been invaded by oaks and other woody species, primarily because of fire suppression since A.D. 1972. The rapid and complex changes now occurring are a response to the compounded effects of plant succession, intense burning and logging in the 19th century, recent fire suppression, and possibly increased airborne deposition of nitrates. The compilation of several historical research techniques emphasizing different time scales allows this study of the interactions between multiple disturbance variables.

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Response of native plants to elevated soil nitrogen in the sand dunes of Lake Michigan, USA

Bird

Choi

2017

Biological Conservation

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Vegetation Patterns in and among Pannes (Calcareous Intradunal Ponds) at the Indiana Dunes National Lakeshore, Indiana

Cited by 8 publications

References 9 publications

Local environmental conditions influence species replacement in Great Lakes interdunal wetland macroinvertebrate communities

Local environmental conditions influence species replacement in Great Lakes interdunal wetland macroinvertebrate communities

Past and current trends of change in a dune prairie/oak savanna reconstructed through a multiple‐scale history

Response of native plants to elevated soil nitrogen in the sand dunes of Lake Michigan, USA

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