Quantitative Assessment of Grassland Quality: Acoustic Determination of Population Sizes of Orthopteran Indicator Species

Fischer, Franz Peter; Schulz, Ulrich; Schubert, Holger; Knapp, Petra; Schmöger, Marcus E.V.

doi:10.1890/1051-0761(1997)007[0909:qaogqa]2.0.co;2

Cited by 50 publications

(25 citation statements)

References 13 publications

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“…For example, models of simulated terrestrial sounds that were tested in an arboreal site suggested that the forest ambient soundscape varies with biological diversity and abundance and that soundscape complexity increases with species richness [ 31 ]. Further, the acoustic presence and abundance of certain grasshopper species in a grassland biotope have been shown to be good predictors of biotope quality [ 32 ]. One investigation of the community soundscape in a Costa Rican forest revealed that acoustic diversity strongly correlates with vertical forest structure complexity, which suggests that acoustic monitoring could be an effective method of identifying forest patches containing high species diversity [ 33 ].…”

Section: Introduction: the Need For Assessing Marine Acoustic Biodivementioning

confidence: 99%

Listening forward: approaching marine biodiversity assessments using acoustic methods

Mooney

Iorio

Lammers³

et al. 2020

R. Soc. open sci.

107

108

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Ecosystems and the communities they support are changing at alarmingly rapid rates. Tracking species diversity is vital to managing these stressed habitats. Yet, quantifying and monitoring biodiversity is often challenging, especially in ocean habitats. Given that many animals make sounds, these cues travel efficiently under water, and emerging technologies are increasingly cost-effective, passive acoustics (a long-standing ocean observation method) is now a potential means of quantifying and monitoring marine biodiversity. Properly applying acoustics for biodiversity assessments is vital. Our goal here is to provide a timely consideration of emerging methods using passive acoustics to measure marine biodiversity. We provide a summary of the brief history of using passive acoustics to assess marine biodiversity and community structure, a critical assessment of the challenges faced, and outline recommended practices and considerations for acoustic biodiversity measurements. We focused on temperate and tropical seas, where much of the acoustic biodiversity work has been conducted. Overall, we suggest a cautious approach to applying current acoustic indices to assess marine biodiversity. Key needs are preliminary data and sampling sufficiently to capture the patterns and variability of a habitat. Yet with new analytical tools including source separation and supervised machine learning, there is substantial promise in marine acoustic diversity assessment methods.

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Section: Introduction: the Need For Assessing Marine Acoustic Biodivementioning

confidence: 99%

Listening forward: approaching marine biodiversity assessments using acoustic methods

Mooney

Iorio

Lammers³

et al. 2020

R. Soc. open sci.

107

108

View full text Add to dashboard Cite

show abstract

“…We conducted auditory surveys by car (de Jong and Kindvall 1991;Berggren et al 2001) on sunny days, between 10 am -5 pm, from mid July until the end of August. Since the species' call is strong and can be heard over distances of approximately 10 m (Fischer et al 1997;Bellman 2006), it is possible to listen for stridulating males from the car window while driving slowly (~30 km/ h) along countryside roads (Berggren et al 2001). We recorded our survey routes and observations of M. roeselii using a GPS (Garmin 60XL).…”

Section: Data Collectionmentioning

confidence: 99%

Modelling the distribution of the invasive Roesel’s bush-cricket (Metrioptera roeselii) in a fragmented landscape

Lundhagen¹,

Berggren²

2011

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The development of conservation strategies to mitigate the impact of invasive species requires knowledge of the species ecology and distribution. This is, however, often lacking as collecting biological data may be both time-consuming and resource intensive. Species distribution models can offer a solution to this dilemma by analysing the species-environment relationship with help of Geographic information systems (GIS). In this study, we model the distribution of the non-native bush-cricket Metrioptera roeselii in the agricultural landscape in mid-Sweden where the species has been rapidly expanding in its range since the 1990s. We extract ecologically relevant landscape variables from Swedish CORINE land-cover maps and use species presence-absence data from large-scale surveys to construct a species distribution model (SDM). The aim of the study is to increase the knowledge of the species range expansion pattern by examining how its distribution is affected by landscape composition and structure, and to evaluate SDM performance at two different spatial scales. We found that models including data on a scale of 1 × 1 km were able to explain more of the variation in species distribution than those on the local scale (10 m buffer on each side of surveyed road). The amount of grassland in the landscape, estimated from the area of arable land, pasture and rural settlements, was a good predictor of the presence of the species on both scales. The measurements of landscape structure – linear elements and fragmentation - gave ambivalent results which differed from previous small scaled studies on species dispersal behaviour and occupancy patterns. The models had good predictive ability and showed that areas dominated by agricultural fields and their associated grassland edges have a high probability being colonised by the species. Our study identified important landscape variables that explain the distribution of M. roeselii in Mid-Sweden that may also be important to other range expanding orthopteran species. This work will serve as a foundation for future analyses of species spread and ecological processes during range expansion

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“…We used twilight and mostly night listening points to identify presence/absence of G.k (also Fischer et al, 1997;Riede, 1998;Beggren et al, 2001). Listening points consisted of stations of 30 minutes in silence, listening and monitoring the possible song of this cricket.…”

Section: The Study Areamentioning

confidence: 99%

New data on the “silver-bell cricket” (Orthoptera, Gryllidae), a forgotten and overlooked cricket subject to a high risk of extinction in western Europe

Llorente¹

2008

GRAELLSIA

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Gryllodinus kerkennensis (Finot, 1893) presents a disjunct distribution in the Southern part of the Western Palearctic from North Africa up to Central Asia inhabiting arid, semidesert or desert land mostly associated with saline soils near water sources of lagoons or river beds depressions. The species was not recorded in Western Europe (Iberian Peninsula) since 1936 and up to now it is currently excluded from all red list books for Orthopteran conservation. In this paper we report a few and localised populations of this cricket in Castilla-La Mancha inhabiting sandy shores of hiper-saline lagoons. We also provide information on its biometrics, phenology, ecology and behaviour including data of all collection specimens of the Museo Nacional de Ciencias Naturales (MNCN). Because of its audible and particular song, we propose campaigns of night listening points to search for this species in other potential sites where it could be present. We believe that this species may be subject to a high risk of extinction in the Iberian Peninsula, and thus in the whole Western Europe. This is because of their restricted populations and the fragility of its specific habitat. We propose an urgent integral protection and the inclusion of the species in the lists of highly endangered invertebrate species.

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Quantitative Assessment of Grassland Quality: Acoustic Determination of Population Sizes of Orthopteran Indicator Species

Cited by 50 publications

References 13 publications

Listening forward: approaching marine biodiversity assessments using acoustic methods

Listening forward: approaching marine biodiversity assessments using acoustic methods

Modelling the distribution of the invasive Roesel’s bush-cricket (Metrioptera roeselii) in a fragmented landscape

New data on the “silver-bell cricket” (Orthoptera, Gryllidae), a forgotten and overlooked cricket subject to a high risk of extinction in western Europe

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