<i>Chionochloa</i>Zotov (Gramineae) in New Zealand

Connor, H. E.

doi:10.1080/0028825x.1991.10416605

Cited by 55 publications

(53 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Austrodanthonia mera, A. clavata, A. racemosa and A. penicillata belong to the group of lowland species in which lemma indumentum is absent or reduced and an association among some or all of these species has been noted repeatedly (e.g. Vickery, 1956;Zotov, 1963;Connor, 1991;Linder, 2004). Joycea pallida and J. lepidopoda make up two of the three species of the genus Joycea and their association on molecular grounds is reassuring rather than surprising.…”

Section: Fit With Morphologymentioning

confidence: 99%

A plastid tree can bring order to the chaotic generic taxonomy of Rytidosperma Steud. s.l. (Poaceae)

Humphreys¹,

Pirie²,

Linder³

2010

Molecular Phylogenetics and Evolution

View full text Add to dashboard Cite

Rytidosperma s.l., wallaby grasses and allies, is in dire need of a single, unanimously accepted generic taxonomy. Motivated by the desire to establish a generic classification that complies with phylogeny, we investigated how much phylogenetic signal is contained within a plastid (cpDNA) tree, given that the nrDNA tree (ITS) was uninformative and that a phylogenetic hypothesis based on a single genome may not be reliable. We find that the plastid tree is significantly different from a morphological cladogram and show that this is the result of homoplasy in the morphological dataset. Treated individually, several morphological characters fit the plastid tree very well. Similarly, we find a good fit of the plastid tree with ecological and distribution characters and with biogeographical patterns in the Southern Hemisphere. We conclude that a significant level of the species phylogeny is resolved by the plastid tree and are confident it can form a sound basis for a reconsideration of generic limits. None of the currently recognised seven genera in the Rytidosperma clade is monophyletic. Therefore, we propose combining the segregate genera in Australasia within a broadly construed Rytidosperma, including all the species from Australia, New Guinea, New Zealand and South America.

show abstract

Section: Fit With Morphologymentioning

confidence: 99%

A plastid tree can bring order to the chaotic generic taxonomy of Rytidosperma Steud. s.l. (Poaceae)

Humphreys¹,

Pirie²,

Linder³

2010

Molecular Phylogenetics and Evolution

View full text Add to dashboard Cite

show abstract

“…1). The pre-European condition of this area was native tussock grasslands (Connor 1991) on rolling topography underlain by Otago schist. Beginning c. 150 years ago, extensive grazing of the grasslands by sheep occurred and later cattle were introduced (O 'Connor 1982).…”

Section: Study Sitesmentioning

confidence: 99%

Headwater stream response to grassland agricultural development in New Zealand

Riley

Townsend

Niyogi

et al. 2003

New Zealand Journal of Marine and Freshwater Research

View full text Add to dashboard Cite

Agricultural development of native grasslands may change stream physico-chemistry in ways that provide both subsidies and stresses to the system. The aims of this study were to determine: (1) which physico-chemical parameters respond most strongly to agricultural development; (2) how biodiversity, community composition, and food-web structure responded to these changes; and (3) to determine the balance between negative and positive impacts of these subsidies and stresses based on the analysis of 18 headwater streams. Developed pasture streams had increased nutrient loading, alterations to streamside vegetation, increased fine sediment composition, and lower moss coverage of streambeds than undeveloped or lightly grazed native grassland catchments (which could not be distinguished from one another). These differences were associated with higher numbers of macroinvertebrate taxa and higher numbers of macroinvertebrates indicating that the net effects of these subsidies and stresses associated with agricultural development were positive within these headwater stream reaches.

show abstract

“…The possibility of inbreeding depression (see above) suggests that the species are normally outcrossing (Schemske & Lande 1985). Also, natural hybrids between a number of Chionochloa species are found in the field (Connor 1991). Finally, indications that pollination is reduced in C. pallens at lower flowering densities (Kelly & Sullivan 1997) suggest that not all pollination comes from pollen on the same inflorescence.…”

Section: Discussionmentioning

confidence: 99%

“…Chionochloa (Poaceae) is a genus of 22 species of large tussock grasses which dominate much of the subalpine zone in the South Island of New Zealand (Connor 1991). The species are wind pollinated and also vary widely in their flowering effort from year to year, i.e., are mast seeding (Connor 1991;Kelly et al 1992).…”

Section: Introductionmentioning

confidence: 99%