scholarly journals Predicting the potential distribution of the invasive freshwater diatom Lindavia intermedia in New Zealand lakes

2021 ◽  
Vol 16 (3) ◽  
pp. 415-442
Author(s):  
Catherine Kilroy ◽  
Amy Whitehead ◽  
Susanna Wood ◽  
Marcus Vandergoes ◽  
Paul Lambert ◽  
...  
Keyword(s):  
New Zealand ◽  
Potential Distribution ◽  
Freshwater Diatom

scholarly journals The geographic distribution of Senecio glastifolius in New Zealand: past, current and climatic potential

2021 ◽  
Author(s):  
◽  
Josef Rehua Beautrais
Keyword(s):  
South Africa ◽  
New Zealand ◽  
Species Distribution ◽  
Potential Distribution ◽  
Species Distribution Modelling ◽  
Suitable Habitat ◽  
Native Range ◽  
Data Set ◽  
Distribution Modelling ◽  
Temperature Range

<p>Senecio glastifolius (Asteraceae) is an invasive species in New Zealand, where it threatens rare and vulnerable coastal floristic communities. It has expanded its range dramatically over recent years and continues to spread. It is subject to control programs in parts of its distribution. Uncertainty over its future distribution and invasive impacts in New Zealand contribute to the difficulty of its management. To address this knowledge gap, the potential distribution of S. glastifolius in New Zealand was predicted, based on its bioclimatic niche.  Existing information on its current distribution and historic spread is incomplete, stored in disparate sources, and is often imprecise or inaccurate. In this study, available information on its distribution and spread was synthesised, processed, and augmented with new data collected in the field by the author. This data set was optimised for use in species distribution modelling.  The distribution of S. glastifolius is described in its native range of South Africa, plus invaded regions in Australia, the British Isles and New Zealand. The data set describing its distribution is of higher quality than any known previous data set, is more extensive, and more suitable for use in species distribution modelling. The historic spread of S. glastifolius in New Zealand is presented, illustrating its expansion from sites of introduction in Wellington, Gisborne, plus several subsequent sites, to its now considerable range throughout much of central New Zealand.  A predictive model of the potential distribution of S. glastifolius was created based on the three main climatic variables observed to limit its distribution: mean annual temperature range, aridity, and minimum temperature of the coldest month. MaxEnt models were trained on data from all regions for which georeferenced records of the species were available; South Africa, Australia, New Zealand and the Isles of Scilly. Predictions were evaluated using methods appropriate to the special case of range-expanding species. Models performed well during validation, suggesting good predictive ability when applied to new areas.  Analysis of the realised niche space of S. glastifolius in the two climatic dimensions most influencing its distribution: Annual Temperature Range and Aridity, indicated that it is exploiting almost totally disjunct niche spaces in New Zealand and South Africa. Of the climate space occupied in New Zealand, almost none is available to the species in its native range of South Africa.  Predictions of S. glastifolius’s potential distribution in New Zealand reveal significant areas of suitable habitat yet to be invaded. Much of this suitable habitat is contiguous with the current range and active dispersal front of S. glastifolius, suggesting that invasion is highly likely under a scenario of no management intervention. Specifically, it is suggested that control and surveillance in coastal Taranaki are required to prevent invasion of an area covering most of the northern third of the North Island.</p>

scholarly journals The potential distribution of yellow bristle grass (Setaria pumila) in New Zealand

2014 ◽  
Vol 67 ◽  
pp. 226-230
Author(s):  
S.L. Lamoureaux ◽  
G.W. Bourd?t
Keyword(s):  
Climate Change ◽  
New Zealand ◽  
North America ◽  
Potential Distribution ◽  
Dairy Farms ◽  
Native Range ◽  
Annual Grass ◽  
The North ◽  
North And South ◽  
Grass Weed

Yellow bristle grass (Setaria pumila) an invasive annual grass weed in North America Africa Australia and New Zealand has become a problem on dairy farms in the upper North Island To define its potential distribution in New Zealand an ecoclimatic model was constructed using CLIMEX The model was parameterised using the known distribution of the species in its native range in Eurasia and validated against its invaded range in North America The model predicted all known occurrences in New Zealand and revealed extensive tracts of land in both the North and South Islands that are currently climatically suitable yet according to current records unoccupied by the weed Under climate change this potential distribution increases substantially These results imply that yellow bristle grass could become a much wider problem on dairy farms throughout New Zealand and that management to limit its spread is justified

scholarly journals The geographic distribution of Senecio glastifolius in New Zealand: past, current and climatic potential

2021 ◽  
Author(s):  
◽  
Josef Rehua Beautrais
Keyword(s):  
South Africa ◽  
New Zealand ◽  
Species Distribution ◽  
Potential Distribution ◽  
Species Distribution Modelling ◽  
Suitable Habitat ◽  
Native Range ◽  
Data Set ◽  
Distribution Modelling ◽  
Temperature Range

<p>Senecio glastifolius (Asteraceae) is an invasive species in New Zealand, where it threatens rare and vulnerable coastal floristic communities. It has expanded its range dramatically over recent years and continues to spread. It is subject to control programs in parts of its distribution. Uncertainty over its future distribution and invasive impacts in New Zealand contribute to the difficulty of its management. To address this knowledge gap, the potential distribution of S. glastifolius in New Zealand was predicted, based on its bioclimatic niche.  Existing information on its current distribution and historic spread is incomplete, stored in disparate sources, and is often imprecise or inaccurate. In this study, available information on its distribution and spread was synthesised, processed, and augmented with new data collected in the field by the author. This data set was optimised for use in species distribution modelling.  The distribution of S. glastifolius is described in its native range of South Africa, plus invaded regions in Australia, the British Isles and New Zealand. The data set describing its distribution is of higher quality than any known previous data set, is more extensive, and more suitable for use in species distribution modelling. The historic spread of S. glastifolius in New Zealand is presented, illustrating its expansion from sites of introduction in Wellington, Gisborne, plus several subsequent sites, to its now considerable range throughout much of central New Zealand.  A predictive model of the potential distribution of S. glastifolius was created based on the three main climatic variables observed to limit its distribution: mean annual temperature range, aridity, and minimum temperature of the coldest month. MaxEnt models were trained on data from all regions for which georeferenced records of the species were available; South Africa, Australia, New Zealand and the Isles of Scilly. Predictions were evaluated using methods appropriate to the special case of range-expanding species. Models performed well during validation, suggesting good predictive ability when applied to new areas.  Analysis of the realised niche space of S. glastifolius in the two climatic dimensions most influencing its distribution: Annual Temperature Range and Aridity, indicated that it is exploiting almost totally disjunct niche spaces in New Zealand and South Africa. Of the climate space occupied in New Zealand, almost none is available to the species in its native range of South Africa.  Predictions of S. glastifolius’s potential distribution in New Zealand reveal significant areas of suitable habitat yet to be invaded. Much of this suitable habitat is contiguous with the current range and active dispersal front of S. glastifolius, suggesting that invasion is highly likely under a scenario of no management intervention. Specifically, it is suggested that control and surveillance in coastal Taranaki are required to prevent invasion of an area covering most of the northern third of the North Island.</p>

A history of freshwater diatom research in New Zealand

1983 ◽  
Vol 11 (2) ◽  
pp. 223-231 ◽  
Author(s):  
VIVIENNE CASSIE
Keyword(s):  
New Zealand ◽  
New Records ◽  
Diatom Flora ◽  
Freshwater Phytoplankton ◽  
The United Kingdom ◽  
History Of ◽  
Nineteenth And Twentieth Centuries ◽  
Late Nineteenth ◽  
Diatom Taxonomy ◽  
Freshwater Diatom

New records to the freshwater diatom flora of New Zealand were made by British and European diatomists in the late nineteenth and twentieth centuries, mainly from collections of interested amateurs. Between 1960 and 1975 several taxonomic papers were published in the United Kingdom on diatomite deposits, and ecological surveys were carried out in New Zealand on freshwater phytoplankton. During the last decade sediment studies have been made and significant contributions on diatom taxonomy have come from European workers.

scholarly journals Effect of climate change on Oriental fruit fly in New Zealand and the Pacific

2007 ◽  
Vol 60 ◽  
pp. 271-278 ◽  
Author(s):  
D.J. Kriticos ◽  
A.E.A. Stephens ◽  
A. Leriche
Keyword(s):  
Climate Change ◽  
New Zealand ◽  
Potential Distribution ◽  
Fruit Fly ◽  
Climate Change Scenarios ◽  
Oriental Fruit Fly ◽  
Central Pacific ◽  
The North ◽  
The Pacific ◽  
Successful Establishment

A CLIMEX model of the Oriental fruit fly (OFF) indicates that under the reference climate (19611990) OFF could persist throughout most of the central Pacific In New Zealand it could establish throughout much of the lowlying areas of the North Island and much of New Zealand could support shortterm populations during the summer months Climate change scenarios for the 2080s indicate that in the central Pacific the change in potential distribution is relatively minor However parts of New Zealand could become substantially more climatically suitable increasing the likelihood of successful establishment of OFF after an incursion and seriously threatening the horticultural sector Should OFF become established in New Zealand it is likely to follow any expansion of the horticultural sector into the coastal areas of the eastern part of the South Island as far south as Oamaru

scholarly journals Predicting the potential global distribution of Pseudomonas syringae pv actinidiae (Psa)

2013 ◽  
Vol 66 ◽  
pp. 184-193 ◽  
Author(s):  
H.A. Narouei Khandan ◽  
S.P. Worner ◽  
E.E. Jones ◽  
S.L.H. Villjanen-Rollinson ◽  
L. Gallipoli ◽  
...  
Keyword(s):  
South Africa ◽  
New Zealand ◽  
Pseudomonas Syringae ◽  
Potential Distribution ◽  
Environmental Data ◽  
Bacterial Canker ◽  
Validation Data ◽  
Modelling Effort ◽  
Global And Local ◽  
Current Potential

The increasing spread of kiwifruit bacterial canker caused by Pseudomonas syringae pv actinidiae (Psa) prompted a modelling effort to assess the global and local potential risk of this species The current potential distribution of Psa was modelled with two wellused models (CLIMEX and MaxEnt) based on available presence records and environmental data Most discrepancies in model projections occurred for New Zealand data that was used for validation Model projections can provide information to alert decisionmakers in kiwifruitgrowing regions to prepare for possible incursions of Psa However in this study because model findings did not agree on the New Zealand validation data more research is necessary to achieve greater confidence on projections for novel areas Despite that result this study provides useful information for some kiwifruit growing countries that have not yet been affected by Psa such as USA Iran Greece Belgium Denmark and especially South Africa where commercial kiwifruit orchards have been planted recently

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