Insect conservation in the southern temperate zones: an overview

New, Tim R.; Samways, Michael J.

doi:10.1111/aen.12071

Cited by 31 publications

(15 citation statements)

References 39 publications

(38 reference statements)

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“…Comparisons of the publications on European and North American continents do not generate large differences between biomonitoring results; in both regions, invertebrate fauna and bioindicators are substantially well documented. In addition, there are programmes developed for monitoring freshwater environments with effective agencies that apply many of policies for biomonitoring, which provide support for conservation (Li et al ., ; Cardoso et al ., ; New & Samways, ). The southern hemisphere, South America, Oceania, and Africa have the lowest percentages of publications.…”

Section: Discussionmentioning

confidence: 99%

Chironomids as indicators in freshwater ecosystems: an assessment of the literature

Nicácio

Juen

2015

Insect Conserv Diversity

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Abstract. 1. Freshwater assessment studies have been used changes on individuals and populations of Chironomidae assemblages as bioindicators to assay aquatic ecosystems changes and environmental quality. To assess the contribution of the studies with this family to response aquatic environmental changes, we carried out a scientometric analysis of the papers published from 1992 to 2012.2. We imported papers from ISI Web of Knowledge database (Thomson Reuters) in November 2013. A total of 2967 papers were evaluated and we carried out descriptive analysis to assay the main trends on Chironomidae research in freshwater assessments.3. The main ideas and approaches in these studies were related to the impact of human influence on aquatic ecosystems and the status of conservation of this environments, as well as to limitations and difficulties in the applications of the assessments.4. In view of our results, we suggest some ideas to contribute to the conservation of aquatic ecosystems, mainly in threatened environments in southern Hemisphere countries. However, Chironomidae identification for assessing aquatic environments, as well as the limitations of suitable tools and metrics, which still are strong issues that need more attention to make more robust approaches to assay aquatic ecosystems.

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Section: Discussionmentioning

confidence: 99%

Chironomids as indicators in freshwater ecosystems: an assessment of the literature

Nicácio

Juen

2015

Insect Conserv Diversity

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“…Furthermore, the lack of autecological studies with odonates is remarkable in the Neotropical Region, as this is the least known area in the world; knowledge on insect assemblages is especially poor in temperate zones of South America (Kalkman et al . ; New & Samways ).…”

Section: Methodsmentioning

confidence: 99%

Effects of wetland hydroperiod length on the functional structure of assemblages of Odonata

2017

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The role of hydroperiod as an environmental filter in structuring wetland assemblages is usually associated with trait selection in invertebrates. However, the effects of changes in the hydroperiod of non-permanent wetlands on invertebrate assemblages are still unclear, and few studies have assessed the functional structure of insect assemblages along the hydroperiod gradient. In this study, we investigated the effects of different hydroperiod lengths on the functional structure of Odonata assemblages in non-permanent wetlands (posteriorly classified as 'short-', 'medium-' and 'long-hydroperiod') in southern Brazil in 2013 and 2014. Biological traits related to life-history strategies in temporary waters were assessed according to seasonal patterns of occurrence of nymphal and adult stages of odonates. Following the rationale of an environmental filter produced by hydroperiod, we expected to find (1) higher functional diversity in longer hydroperiods and (2) trait-convergence patterns in odonate assemblages in shorter hydroperiods. Patterns of functional diversity were detected along the hydroperiod gradient. More specifically, higher functional dispersion was found in long-hydroperiod wetlands and trait-convergence patterns occurred in wetlands with shorter hydroperiods, supporting our general hypothesis. Odonate taxa with life-history traits associated with shorter life cycles predominated in medium-and short-hydroperiod wetlands. Our results thus suggest that more pronounced reductions in wetland hydroperiod length should produce odonate assemblages functionally more similar, and these results gain special importance as climate change scenarios indicate that the hydrology of wetlands will be affected by variation in rainfall regimes.

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“…Zealand's invertebrate fauna reflects a uniquely Gondwanan biogeography, and 90% of its species are found nowhere else in the world (New & Samways, 2014;Watts et al, 2012;McGuinness, 2001). Evolutionarily distinctive higher taxa continue to be discovered in New Zealand, for example, the parasitoid wasp family…”

Section: New Zealand's Parasitoid Faunamentioning

confidence: 99%

Optimising Capture Methods for the Evaluation of Parasitoid Wasp Diversity

Saunders¹

2018

Preprint

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Parasitoid wasps are mega-diverse, ecologically dominant, but poorly studied components of global biodiversity. Despite their intensive application within pest management as biocontrol agents, little is known about native species. To understand their basic biology they must be collected in sampling programs. However, invertebrate surveys are increasingly subject to funding and time constraints that often preclude complete faunal inventories. In order to maximise the efficiency and reduce the cost of their collection, the application of optimal sampling techniques within a Rapid Biodiversity Assessment framework is proposed. Two sites in the Waitakere Ranges were sampled three times over the summer. An intensive sampling effort of 840 Malaise-trap-days over a three month period was used to determine the relationship between sampling effort and observed species richness. Rarefaction techniques and non-parametric estimators were used to predict true species richness and to evaluate the completeness of sampling. Results show that an intensive Malaise-trapping regime over the summer can capture two-thirds of parasitoid wasp species present. Sampling recommendations are provided to guide optimal usage of Malaise traps for both ecological studies and faunal inventories. Modern taxonomic methods are reviewed and a new species of parasitoid wasp is described, representing the first New Zealand species from the genus Lusius (Ichneumonidae: Ichneumoninae). Morphological measurements confirm the new species represents a significant range expansion for the genus. Greater collaboration between ecologists and taxonomists is encouraged, in order to make more efficient use of resources, data, and expertise unique to each discipline. This is the first study to investigate the relationship between sampling effort and parasitoid wasp diversity in New Zealand. It shows that very high sampling effort fails to catch all species present. Parasitoid wasps are known to be keystone species that show promise as indicators of environmental quality and as surrogates for the diversity of other taxa. The development of optimal sampling strategies will therefore provide an important foundation for their future study.

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Insect conservation in the southern temperate zones: an overview

Cited by 31 publications

References 39 publications

Chironomids as indicators in freshwater ecosystems: an assessment of the literature

Chironomids as indicators in freshwater ecosystems: an assessment of the literature

Effects of wetland hydroperiod length on the functional structure of assemblages of Odonata

Optimising Capture Methods for the Evaluation of Parasitoid Wasp Diversity

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