Germany - Services of architecture, construction and engineering offices and testing laboratories

Description

The importance of secondary traffic areas as biotopes, their possible role as networking elements in a biotope network as well as their importance as dispersal paths for alien species must be investigated in the Rhine-Ruhr / Duisburg study area. The service comprises three lots:1. biotope type mapping of the investigation area as well as fine biotope type mapping of the secondary transport areas2. Vegetation surveys along transects orthogonal to the transport routes and in the surrounding landscape3. Faunistic survey of amphibians, reptiles, ground beetles, spiders, butterflies and birdsThe size of the study area is approx. 23,000 ha. The exact delimitation of the survey area will be agreed between the client and the contractor prior to the start of the work. Taking into account the high population density, particular account is to be taken of the availability of sub-areas, including reference areas remote from transport routes, areas for transect mapping and vegetation surveys.The service essentially comprises:the scientific treatment of the subject in consultation with the client,the organisational implementation of the project,participation in the necessary coordination meetings in the study area and in project-accompanying meetings at the Federal Institute of Hydrology with the participation of the group of supervisors accompanying the research,the ongoing and final documentation of the project results.
The biotope type mapping is divided into an area and a fine biotope mapping.a) Biotope mapping 1:10000The CO carries out a biotope type mapping for the entire study area2 at a scale of 1:10000. This area-wide mapping shall be carried out by means of aerial photo evaluation with supplementary spot checks on site with a focus on areas along the main traffic routes (corridor of 250m to the left and right of the traffic route).b) Fine biotope mapping 1:500In the investigation area, the Contractor shall also define sub-areas for more detailed biotope type mapping in consultation with the Client. The biotope type key of the Federal Institute of Hydrology shall be used. In these sub-areas, the Contractor shall carry out a biotope type mapping of the ancillary traffic areas on a scale of 1:500.c) Recording of protected and endangered plants, neophyte recordingAll recorded biotope types must be supplemented (if applicable, if occurring) by the addition "neophyte-rich" with information on the existing neobiota (qualitative). Analogously, protected and endangered species (if applicable, if listed there: according to local, regional, state or federal lists, potentially invasive according to BfN/Floraweb, Warning List Germany as well as invasive according to Regulation (EU) 2016/1141) shall be noted when found.d) EvaluationThe results of this investigation shall be evaluated by the Contractor with regard to:1. the relative frequency and spatial continuity of the identified biotope types2. the occurrence of biotope types with endangerment and/or protection status (if applicable, according to regional, state and federal lists)3. the degree of influence of the biotope types adjacent to the site on the biotope types with endangerment and/or protection status (if applicable, according to regional, state and federal lists). The degree of influence of neophytes on the biotope types occurring along transport routes and other linear landscape structures Please refer to the tender documents for a detailed description of the services to be provided The Contractor shall carry out the following surveys at four sample points along each of the 15 different spatial situations (see section "Sampling design") of the three areas. The Contractor shall carry out transect mapping orthogonal to the transport modes as well as vegetation surveys with pedological analysis along the transects at four sample points each along the 15 different spatial situations (see section Sampling Design) of the three transport modes federal trunk roads (including state and regional roads), railway lines and federal waterways. This resulted in 72 transects (24 single layers (12 rural, 12 urban) + 24 crossing layers (12 rural, 12 urban) + 24 parallel layers (only rural, 12 pairs, i.e. 1 per transport mode in the parallel course); cf. the following explanations) and 300 vegetation surveys of 4 m² each (per transect at four distances from the transport mode), as well as 80 reference areas.Processing and evaluation of the vegetation-floristic data: The results of the transect mapping and the vegetation surveys are analysed with special regard to special species (endangered, protected, special responsibility - if applicable according to local, regional, national, regional or local authorities). according to local, regional, state or federal lists)of neophytesof the potential of the secondary transport areas to improve ecological connectivity and the preservation of biological diversity in the landscape contextThe detailed description of the services to be provided can be found in the tender documents 1) Study areasA precise sampling plan must be developed taking into account the specifications (cf. 2.2, Mini-mal requirement in accordance with the Aschaffenburg study area) and agreed with the AG. This applies in particular to the methodological procedure for recording invertebrates (here: ground beetles, spiders and butterflies). The CO shall carry out comparative faunistic surveys at selected sites (see below), taking into account all existing modes of transport and a pronounced gradient.2) Preparation of habitat suitability maps:Digital habitat suitability maps are to be prepared for the entire study area for all occurring amphibian, reptile and bird species, in which the potential habitats and their suitability as (partial) habitat (if necessary, separated according to reproduction, feeding and wintering habitats, etc., if such habitat differences exist) of the respective species are to be presented for the entire study area. The content and the legend of the habitat suitability maps are to be agreed with the AG. These maps serve as a basis for the determination of the study areas for the survey of the individual species and for the representation of the potential distribution of the species. The habitat suitability map must be incorporated into the digital map (GIS) before mapping begins.3) Preparation and evaluation of the zoological data:a) Mappingb) Assessment of current status4) Explanatory report Please refer to the tender documents for a detailed description of the services to be provided.

Opportunity closing date

31 August 2021

Value of contract

to be confirmed