Invasion of Nipponaclerda biwakoensis (Hemiptera: Aclerdidae) and Phragmites australis die-back in southern Louisiana, USA
Common reed, Phragmites australis (Cav.) Trin. Ex Steud., is the dominant emergent vegetation in the lower Mississippi River Delta (MRD), Louisiana, USA and is comprised primarily of introduced lineages of different phylogeographic origins. Dense stands of P. australis are important for protecting m...
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Veröffentlicht in: | Biological invasions 2018-10, Vol.20 (10), p.2739-2744 |
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Sprache: | eng |
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Zusammenfassung: | Common reed,
Phragmites australis
(Cav.) Trin. Ex Steud., is the dominant emergent vegetation in the lower Mississippi River Delta (MRD), Louisiana, USA and is comprised primarily of introduced lineages of different phylogeographic origins. Dense stands of
P. australis
are important for protecting marsh soils from wave action and storm surges. In the Fall of 2016, while investigating symptoms of die-back of
Phragmites
stands in the lower marsh, a non-native scale was found infesting affected stands in high densities. Identified as
Nipponaclerda biwakoensis
(Kuwana) (Hemiptera: Aclerdidae), the scale was well established across the lower MRD. This report represents the first recorded population of
Nipponaclerda biwakoensis
in North America. Intriguingly, there are noticeable differences in die-back symptoms and in scale densities among different lineages of
Phragmites
in the MRD, with stands of the well-known European invasive lineage appearing healthier and having lower scale densities than other
Phragmites
lineages. Given its apparent relationship with the die-back syndrome, the scale may have serious implications for the health and stability of
Phragmites
marsh communities across coastal Louisiana. Efforts are currently underway to investigate the role of the scale and other abiotic stressors in the die-backs and potential management solutions. |
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ISSN: | 1387-3547 1573-1464 |
DOI: | 10.1007/s10530-018-1749-5 |