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- Carduus (1)
- Carduus acanthoides; Carduus nutans; central Pennsylvania USA; co-invasion; competition; congeners; invasional interference; invader–invader interactions; invasion ecology; invasive species management; thistles (1)
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- Coexistence; disturbance; intermediate; intermediate disturbance hypothesis; relative nonlinearity; storage effect (1)
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- Microstegium vimineum (1)
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Articles 1 - 10 of 10
Full-Text Articles in Life Sciences
Moving From Pattern To Process: Coexistence Mechanisms Under Intermediate Disturbance Regimes, Katriona Shea, Stephen H. Roxburgh, Emily Rauschert
Moving From Pattern To Process: Coexistence Mechanisms Under Intermediate Disturbance Regimes, Katriona Shea, Stephen H. Roxburgh, Emily Rauschert
Emily Rauschert
Coexistence mechanisms that require environmental variation to operate contribute importantly to the maintenance of biodiversity. One famous hypothesis of diversity maintenance under disturbance is the intermediate disturbance hypothesis (IDH). The IDH proposes patterns of peaked diversity under intermediate disturbance regimes, based on a tension between competitively superior species and species which can rapidly colonize following disturbance. We review the literature, and describe recent research that suggests that more than one underlying mechanism can generate this unimodal diversity pattern in disturbed environments. Several exciting emerging research areas are identified, including interactions between disturbance types, operation of the IDH in multi-trophic systems, …
Primary Literature Across The Undergraduate Curriculum: Teaching Science Process Skills And Content, Emily S.J. Rauschert, Joseph Dauer, Jennifer L. Momsen, Ariana Sutton-Grier
Primary Literature Across The Undergraduate Curriculum: Teaching Science Process Skills And Content, Emily S.J. Rauschert, Joseph Dauer, Jennifer L. Momsen, Ariana Sutton-Grier
Emily Rauschert
No abstract provided.
Slow Spread Of The Aggressive Invader, Microstegium Vimineum (Japanese Stiltgrass), Emily S.J. Rauschert, David A. Mortensen, Ottar N. Bjørnstad, Andrea N. Nord, Nora Peskin
Slow Spread Of The Aggressive Invader, Microstegium Vimineum (Japanese Stiltgrass), Emily S.J. Rauschert, David A. Mortensen, Ottar N. Bjørnstad, Andrea N. Nord, Nora Peskin
Emily Rauschert
Microstegium vimineum (Japanese stiltgrass) is a non-native weed whose rapid invasion threatens native diversity and regeneration in forests. Using data from a 4 year experiment tracking new invasions in different habitats, we developed a spatial model of patch growth, using maximum likelihood techniques to estimate dispersal and population growth parameters. The patches expanded surprisingly slowly: in the final year, the majority of new seedlings were still within 1 m of the original patch. The influence of habitat was not as strong as anticipated, although patches created in roadside and wet meadow habitats tended to expand more rapidly and had greater …
Plant Community Associations Of Two Invasive Thistles, Emily S.J. Rauschert, Katriona Shea, Sarah Goslee
Plant Community Associations Of Two Invasive Thistles, Emily S.J. Rauschert, Katriona Shea, Sarah Goslee
Emily Rauschert
In order to combat the growing problems associated with biological invasions, many researchers have focused on identifying which communities are most vulnerable to invasion by exotic species. However, once established, invasive species can significantly change the composition of the communities that they invade. The first step to disentangling the direction of causality is to discern whether a relationship with other vegetation exists at all. Carduus nutans and C. acanthoides are similar invasive thistles, which have caused substantial economic damage worldwide. We assessed the associations between the thistles and the standing flora in four sites in central Pennsylvania in which they …
Using Discussion To Promote Learning In Undergraduate Biology, Ariana E. Sutton-Grier, Emily S.J. Rauschert, Jennifer Momsen
Using Discussion To Promote Learning In Undergraduate Biology, Ariana E. Sutton-Grier, Emily S.J. Rauschert, Jennifer Momsen
Emily Rauschert
Summary and Comments from Workshop 40: “Looks Who's Talking! Using Discussion as an Effective Learning Tool” presented at the 100th Ecological Society of America Meeting
Japanese Stiltgrass: An Invasive Plant On The Move, Emily S.J. Rauschert, Andrea N. Nord
Japanese Stiltgrass: An Invasive Plant On The Move, Emily S.J. Rauschert, Andrea N. Nord
Emily Rauschert
No abstract provided.
A Unifying Gravity Framework For Dispersal, Eelke Jongejans, Olav Skarpaas, Matthew J. Ferrari, Eric S. Long, Joseph T. Dauer, Carrie M. Schwarz, Emily S.J. Rauschert, Randa Jabbour, David A. Mortensen, Scott A. Isard, David A. Lieb, Zeynep Sezen, Andrew G. Hulting, Katriona Shea
A Unifying Gravity Framework For Dispersal, Eelke Jongejans, Olav Skarpaas, Matthew J. Ferrari, Eric S. Long, Joseph T. Dauer, Carrie M. Schwarz, Emily S.J. Rauschert, Randa Jabbour, David A. Mortensen, Scott A. Isard, David A. Lieb, Zeynep Sezen, Andrew G. Hulting, Katriona Shea
Emily Rauschert
Most organisms disperse at some life-history stage, but different research traditions to study dispersal have evolved in botany, zoology, and epidemiology. In this paper, we synthesize concepts, principles, patterns, and processes in dispersal across organisms. We suggest a consistent conceptual framework for dispersal, which utilizes generalized gravity models. This framework will facilitate communication among research traditions, guide the development of dispersal models for theoretical and applied ecology, and enable common representation across taxonomic groups, encapsulating processes at the source and destination of movement, as well as during the intervening relocation process, while allowing each of these stages in the dispersal …
Coexistence Patterns Of Two Invasive Thistle Species, Carduus Nutans And C. Acanthoides, At Three Spatial Scales, Emily S.J. Rauschert, Katriona Shea, Ottar N. Bjørnstad
Coexistence Patterns Of Two Invasive Thistle Species, Carduus Nutans And C. Acanthoides, At Three Spatial Scales, Emily S.J. Rauschert, Katriona Shea, Ottar N. Bjørnstad
Emily Rauschert
To better understand the competitive processes involved in invasion by congeners, we examine coexistence patterns of two invasive species, Carduus nutans and C. acanthoides, at three spatial scales. A roadside survey of 5 × 5 km blocks in a previously identified overlap zone provided information about the regional scale. At smaller scales, we surveyed four fields of natural co-occurrence, quantifying the spatial patterns at the field scale by randomly placed 1 × 1 m quadrats and at the smallest scale by detailing plant position within the quadrats. The patterns observed are strikingly different at the different scales. At the regional …
Influence Of Microsite Disturbance On The Establishment Of Two Congeneric Invasive Thistles, Emily S.J. Rauschert, Katriona Shea
Influence Of Microsite Disturbance On The Establishment Of Two Congeneric Invasive Thistles, Emily S.J. Rauschert, Katriona Shea
Emily Rauschert
The successful establishment of invasive species has been shown to depend on aspects of the invaded community, such as gap characteristics. Biotic resistance may be particularly critical for stopping invaders at early life history stages, but new species can often invade following disturbances, which may create microsites with very different characteristics than are usually present. We examine the response of two invasive thistle species, Carduus nutans L. and C. acanthoides L., to three different microsite characteristics: disturbance type, size, and water availability. The two species initially responded differently to the type of disturbance: C. acanthoides had higher emergence and survival …
Invasional Interference Due To Similar Inter- And Intraspecific Competition Between Invaders May Affect Management, Emily S.J. Rauschert, Katriona Shea
Invasional Interference Due To Similar Inter- And Intraspecific Competition Between Invaders May Affect Management, Emily S.J. Rauschert, Katriona Shea
Emily Rauschert
As the number of biological invasions increases, the potential for invader– invader interactions also rises. The effect of multiple invaders can be superadditive (invasional meltdown), additive, or subadditive (invasional interference); which of these situations occurs has critical implications for prioritization of management efforts. Carduus nutans and C. acanthoides, two congeneric invasive weeds, have a striking, segregated distribution in central Pennsylvania, USA. Possible hypotheses for this pattern include invasion history and chance, direct competition, or negative interactions mediated by other species, such as shared pollinators. To explore the role of resource competition in generating this pattern, we conducted three related experiments …