A comparison of modeled and measured impacts of resource manipulations for control of Bromus tectorum in sagebrush steppe

Mata-González, Ricardo; Hunter, Rachael G.; Coldren, Cade; McLendon, Terry; Paschke, Mark W.

doi:10.1016/j.jaridenv.2007.10.007

Cited by 15 publications

(8 citation statements)

References 39 publications

(59 reference statements)

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“…Very likely, under these conditions the plant may behave as an annual, and when the adult plant dies, there are new seedlings. This characteristic of adaptation to fire has been observed in other invasive species in North America (22,68,69) . In other studies, it has been reported that fire increases the probability of natal grass invasion (5) .…”

Section: Controlsupporting

confidence: 68%

“…Muy probablemente, bajo estas condiciones la planta se puede comportar como anual y, si bien la planta adulta muere, se presenta un reclutamiento de nuevas plántulas. Esta característica de adaptación al fuego se ha observado con otras especies invasoras en Norteamérica (22,68,69) . En otros trabajos se ha reportado que el fuego incrementa la probabilidad de invasión del pasto rosado (5) .…”

Section: Controlunclassified

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Biología del pasto rosado Melinis repens (Willd.) e implicaciones para su aprovechamiento o control

Melgoza‐Castillo¹,

Valladares²,

González³

et al. 2015

RMCP

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RESUMEN El pasto rosado (Melinis repens) es una especie introducida de África que invade diversos ecosistemas. EnMéxico se encuentra en todos los Estados, y en Chihuahua es la especie dominante en extensas áreas de pastizales. Las invasiones reducen la calidad y cantidad de los productos y servicios del ecosistema. No se sabe exactamente cuándo llegó al continente americano. Dependiendo de las condiciones climáticas puede comportarse como anual o perenne de vida corta. Produce abundante semilla durante años con precipitaciones por debajo de lo normal comparados con años lluviosos. La germinación de la semilla puede ser en presencia de luz o sin ella, la máxima germinación es entre 20 a 35 ºC; a -0.2 MPa se inhibe la germinación y el fuego no la afecta. ABSTRACTNatal grass (Melinis repens) is an introduced specie from Africa that is invading different ecosystems. In Mexico, it is present all over the country and dominates large areas of grasslands. Plant invasion reduces quality and quantity of ecosystem goods and services. The knowledge of the biology of invasive species is a key factor when a management and control plan will be established. It is unknown when this specie arrived to America. Depending on climatic conditions this grass may behave as annual or perennial. Seed production is larger in years with precipitation below normal than in wet years. Germination takes place with or without light, optimum temperature is from 20 to 35 ºC; at -0.2 MPa germination is inhibited, and fire does not affect seed germination. When moisture is not limited and during the early development, root:shoot ratios ranges from 1.13 to 1.90 and relative growth rate from 0.0034 to 0.15 mg g-1 d-1 ; also, biomass is reduced when natal grass grows on native soil compared to sterilized soil. Although it is considered as poor forage, the main use is as pasture. Other uses reported include ornamental, medicinal, and fito-remediation. Fire favors its growth, and no control method is known. So far, grazing of natal grass is the most viable management. Additionally, when planning a control campaign it is important to reduce the movement of this specie as part of human activities.

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Section: Controlsupporting

confidence: 68%

Section: Controlunclassified

Biología del pasto rosado Melinis repens (Willd.) e implicaciones para su aprovechamiento o control

Melgoza‐Castillo¹,

Valladares²,

González³

et al. 2015

RMCP

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“…The role of fire in influencing these patterns was clear: both cheatgrass and medusahead occur in greater abundance in burned areas of the Monument. While bluebunch wheatgrass may be relatively resilient to fire (Table 1; Miller et al 2013), cheatgrass and medusahead exploit post-fire conditions and rapidly infest into previously intact areas, particularly if bluebunch wheatgrass fire-induced mortality is high (Mata-Gonzalez et al 2008, Davies et al 2009). The Monument study area is very rugged and the erosion of intact bunchgrass stands from fire, weeds, and historic grazing appears to be strongly buffered by topography (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…The abundances of these steppe foundation species correlate strongly with resilience to fire and resistance to invasion (Chambers et al 2007, Brooks and Chambers 2011, Condon et al 2011, Davies et al 2012, Reisner et al 2013. The uptake of soil nitrogen and water by big sagebrush and by bunchgrasses has been shown through removal experiments to reduce community invasibility (Chambers et al 2007, James et al 2008, Mata-Gonzalez et al 2008, Prevey et al 2010. Additionally, the severity of infestations of cheatgrass and another invasive annual grass, medusahead (Taeniatherum caput-medusae), are inversely correlated with the abundances of pre-existing native perennial bunchgrasses (Davies 2008, Condon et al 2011, Davies et al 2012, Reisner et al 2013.…”

Section: Introductionmentioning

confidence: 99%

Predicting foundation bunchgrass species abundances: model‐assisted decision‐making in protected‐area sagebrush steppe

et al. 2014

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Abstract. Foundation species are structurally dominant members of ecological communities that can stabilize ecological processes and influence resilience to disturbance and resistance to invasion. Being common, they are often overlooked for conservation but are increasingly threatened from land use change, biological invasions, and over-exploitation. The pattern of foundation species abundances over space and time may be used to guide decision-making, particularly in protected areas for which they are iconic. We used ordinal logistic regression to identify the important environmental influences on the abundance patterns of bluebunch wheatgrass (Pseudoroegneria spicata), Thurber's needlegrass (Achnatherum thurberianum), and Sandberg bluegrass (Poa secunda) in protected-area sagebrush steppe. We then predicted bunchgrass abundances along gradients of topography, disturbance, and invasive annual grass abundance. We used model predictions to prioritize the landscape for implementation of a management and restoration decision-support tool. Models were fit to categorical estimates of grass cover obtained from an extensive ground-based monitoring dataset. We found that remnant stands of abundant wheatgrass and bluegrass were associated with steep north-facing slopes in higher and more remote portions of the landscape outside of recently burned areas where invasive annual grasses were less abundant. These areas represented only 25% of the landscape and were prioritized for protection efforts. Needlegrass was associated with south-facing slopes, but in low abundance and in association with invasive cheatgrass (Bromus tectorum). Abundances of all three species were strongly negatively correlated with occurrence of another invasive annual grass, medusahead (Taeniatherum caput-medusae). The rarity of priority bunchgrass stands underscored the extent of degradation and the need for prioritization. We found no evidence that insularity reduced invasibility; annual grass invasion represents a serious threat to protected-area bunchgrass communities. Our study area was entirely within the Wyoming big sagebrush ecological zone, understood to have inherently low resilience to disturbance and resistance to weed invasion. However, our study revealed important variation in abundance of the foundation species associated with resilience and resistance along the topographic-soil moisture gradient within this zone, providing an important foothold for conservation decision-making in these steppe ecosystems. We found the foundation species focus a parsimonious strategy linking monitoring to decision-making via biogeographic modeling.

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“…Invasions may be favoured by disturbances that directly result in destruction of vegetation or that indirectly produce changes in resources available to plants (Davis et al, 2000;Krueger-Mangold et al, 2006). Fire, flooding, drought, heavy grazing, and nutrient deposition are commonly cited disturbances that facilitate weed invasions (Hobbs and Huenneke, 1992;Reever Morghan and Seastedt, 1999;Mata-González et al, 2008). Changes in hydrological regimes also have the potential to favour species replacement (Stromberg et al, 2007), and declines in groundwater levels may promote the expansion of invasive annuals (Elmore et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Invasive plants and plant diversity as affected by groundwater depth and microtopography in the Great Basin

Mata-González

Martin²,

McLendon

et al. 2011

Ecohydrology

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We evaluated invasive exotic weeds and plant species diversity in relation to depth to groundwater (DTW) and microtopography in areas with DTW from 0·3–4 m in Owens Valley, California. Transects dominated by common plant species of the area were read at 1‐cm intervals, and species cover was obtained at different scales: 1‐m transect portions (microsites), whole transects (68 m average length), and the whole study area. Species richness and the Shannon–Wiener diversity index were obtained in microsites. DTW and microtopographical variation (soil‐surface relative elevations) were jointly measured along the vegetation transects. Found in 34% of the sampled transects, the annual Bassia hyssopifolia was the most common exotic weed of the area. Its cover in the whole study area was only 0·9%, but it was the second most dominant species (19% cover) in microsites. B. hyssopifolia coexisted mainly with herbaceous species, typically in places with shallow groundwater (average <1·5 m) and microtopographical depressions. However, B. hyssopifolia cover was not affected by variations in DTW or relative elevation. In contrast, B. hyssopifolia cover was negatively associated with perennial cover and species richness. Species diversity (Shannon–Wiener) slightly decreased with the increase in DTW but not with changes in microtopography. In contrast, species richness clearly varied with the identity of the dominant species in microsites. Our study suggests that the variation in community‐intrinsic factors such as competition and diversity may play a greater role in the growth of invasive plants than the variation in physical factors such as groundwater and microtopography. Copyright © 2011 John Wiley & Sons, Ltd.

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A comparison of modeled and measured impacts of resource manipulations for control of Bromus tectorum in sagebrush steppe

Cited by 15 publications

References 39 publications

Biología del pasto rosado Melinis repens (Willd.) e implicaciones para su aprovechamiento o control

Biología del pasto rosado Melinis repens (Willd.) e implicaciones para su aprovechamiento o control

Predicting foundation bunchgrass species abundances: model‐assisted decision‐making in protected‐area sagebrush steppe

Invasive plants and plant diversity as affected by groundwater depth and microtopography in the Great Basin

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