Hymenachne amplexicaulis (Rudge) Nees (hymenachne) cv. Olive

Wildin, J. H.

doi:10.1071/ea9890293

Cited by 4 publications

(2 citation statements)

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“…By 2017, H. amplexicaulis was observed in 104 of the 158 investigated wetlands (66%), with the highest level of invasion recorded in the East region (93%) (Figure 1). These findings suggest that H. amplexicaulis is rapidly spreading throughout our study site, as previously observed in Queensland, Australia (Low 1997;Wildin 1989). We only surveyed a quarter of the wetlands present at our site.…”

Section: Hymenachne Amplexicaulis At Buck Island Ranchsupporting

confidence: 76%

Landscape factors driving the spread of the invasive grass,Hymenachne amplexicaulis, among wetlands in a Florida subtropical grazing land

Bouchard

Sonnier

Pierre

et al. 2020

Invasive plant sci. manag.

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Wetlands embedded in agroecosystems provide vital ecosystem services (i.e., freeze protection, water retention, nutrient cycling, biodiversity support). However, they are particularly susceptible to invasion by nonnative species. West Indian marsh grass [Hymenachne amplexicaulis (Rudge) Nees] is a major wetland invader in Florida. Despite the documented consequences of H. amplexicaulis invasions, the landscape factors influencing the spread of this species are poorly understood. In this study, we asked whether landscape factors associated with wetland isolation, connectivity, and land management influence the presence of H. amplexicaulis among wetlands embedded in pastures. We recorded the presence or absence of H. amplexicaulis in 158 seasonal wetlands embedded in different pasture types (semi-natural vs. intensively managed). Wetland area, isolation from neighboring wetlands, isolation from the nearest source ditch, and connectivity were determined using a geographic information system (GIS). We related landscape factors to H. amplexicaulis using generalized linear models and model selection based on the second-order Akaike information criterion. Hymenachne amplexicaulis was first detected at the study site in the early 2000s. By 2018, we observed this species in 66% of the surveyed wetlands. The likelihood of observing H. amplexicaulis was higher in wetlands embedded in semi-natural pastures and higher in less isolated wetlands, especially when connected to a ditch. These results indicate that H. amplexicaulis spreads both overland (during seasonal flooding) and via the ditch network. Future work is needed to understand whether seeds or stolons are the primary invasion propagule and whether the species forms a persistent seed bank that could slow down restoration efforts. Additionally, further research is required to understand the ecological impact of this highly invasive plant in Florida wetlands.

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Section: Hymenachne Amplexicaulis At Buck Island Ranchsupporting

confidence: 76%

Landscape factors driving the spread of the invasive grass,Hymenachne amplexicaulis, among wetlands in a Florida subtropical grazing land

Bouchard

Sonnier

Pierre

et al. 2020

Invasive plant sci. manag.

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“…Azuche has shown to be a double attributes species when introduced to new areas: in Australia it was introduced from Haiti within an interchange with Venezuela (Csurhes and Edwards 1998), it was evaluated and released as cultivar Olive (Wilden and Chapman 1987;Wilden 1988;Wilden and Oram 1989) before it was recognized as a dangerous weed (Csurhes and Edwards 1998;NWSEC 2000). The same situation has occurred in Florida where the valuable forage attributes for Azuche have been reported (Kalmbacher et al 1998) and later its potential danger as a weed (Hill 2000).…”

Section: Introductionmentioning

confidence: 99%

Azuche, Hymenachne amplexicaulis (Rudge) Nees, Forage Genetic Resources for Floodplains in Tropical Mexico

Enríquez-Quiroz

Quero-Carrillo

Hernández-Garay³

et al. 2006

Genet Resour Crop Evol

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Azuche Hymenachne amplexicaulis (Rudge) Nees is a C 3 grass native to tropical flooded areas in South and Central America with 2n = 2x = 24 chromosomes. During 2002 and 2003, the Graduate College for Agricultural Sciences (CP) and the Mexican Institute for Forestry, Agriculture and Animal Production Research (INIFAP) organized an expedition to collect the genetic diversity of this species within tropical Mexico, in order to preserve and study it under nursery conditions. The collection was performed from Puerto Vallarta to Tapachula on the Pacific and from Palizada, Campeche to Veracruz on the Gulf of Mexico coast, and also crossing sections through the Tehuantepec isthmus and through the Sierra Madre de Chiapas. Ninety sites were sampled, on each, 25 tillers were collected, tagged and stored in a commercial soil mix until establishment of individual plants within 6 l pots. The largest Azuche prairie observed had a 10 ha surface, with the grass limited to small surfaces of up to 0.25 ha. It was not found on places with salty water, even seasonally. The Pacific coastal side is less abundant in niches for this species. Producers' experience indicated that this grass is beneficial for milk production compared with other forage grasses, mainly C 4 , growing in flooded areas. Initial studies of genetic diversity showed wide morphological variation for sprouting ability, leaf width and length among samples. Azuche diversity showed good potential production attributes for farm and wild animals, under flooding tropical savanna conditions.

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