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Coexistence among native and introduced freshwater amphipods (Crustacea); habitat utilization patterns in littoral habitats

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  • Studies Of Biological Invasions Predominantly Stress Threats To Biodiversity Through The Elimination
  • However
  • We Must Realise That Resident Communities May Often Be Capable Of Integrating Invaders
  • Leading To Patterns Of Coexistence
  • Within The Past Ninety Years
  • Three Freshwater Amphipod Species Have Invaded Northern Ireland The North American Gammarus Tigrinus
  • Plus The European G
  • Pulex
  • These Species Have Come Into Contact With The Ubiquitous Native Species
  • G
  • Duebeni Celticus
  • This Study Examined Spatiotemporal Patterns Of Stability Of Single And Mixed Species Assemblages In
  • Lough Beg And Its Associated Rivers Were Surveyed In Summer 1994 And Winter 1995
  • And A Selection Of Stations Re-Sampled In Summer One And Five Years Later
  • All Possible Combinations Of The Four Amphipod Species Were Found
  • Although Species Presence/Absence Was Stable Between Seasons At The Scale Of The Whole Lough
  • It Was Extremely Fluid At The Scale Of Individual Sites
  • 82% Of Which Changed In Species Composition Between Seasons
  • Overall Mean Amphipod Abundance Was Similar Across 5 Distinguishable Habitat Types
  • But There Were Differences In Species Compositions Among These Habitats
  • In Addition
  • Although Co-Occurrences Of Gammarus Species Did Not Differ From Random
  • There Was A Strong Negative Association Between Gammarus Spp
  • And C
  • Pseudogracilis
  • This Latter Pattern Was At Least In Part Generated By The Better Tolerance Of C
  • Pseudogracilis To Lower Water Quality
  • A Review Of Previous Studies Indicates That The Exclusion Of C
  • Pseudogracilis By Gammarus Species From High Water Quality Areas Is Likely To Involve Biotic Interac
  • Thus
  • Overall
  • Co-Existence Of The Four Species
  • Which Is Clearly Dynamic And Scale-Dependent
  • Appears Promoted By Spatial And Temporal Habitat Heterogeneity
  • However
  • Biotic Interactions May Also Play A Role In Local Exclusions
  • Since The Three Introduced Species Have Not Eliminated The Native Species
  • And Each Successive Invasion Has Not Replaced The Previous Invader
  • This Study Demonstrates That Freshwater Invaders May Integrate With Native Communities Leading To Co
  • Design
  • Economics


Queen's University Belfast | Undergraduate Prospectus For Entry 2014 | Section 2 |A-Z of Degrees The A–Z of Degrees 2 BSc Honours Accounting 3 yrs (N400) Accounting with French 4 yrs (N4R1) Accounting with Spanish 4 yrs (N4R4) Economics and Accounting (see Economics entry) The Subject Accounting is concerned with the provision of economic information for both internal and external organisational stakeholders. The undergraduate Accounting degrees at Queen's are designed primarily for students who intend to enter the accounting profession and as such contain considerable practical content, as well as essential theory in the various specialisations of Financial Accounting, Management Accounting, Auditing, Taxation and Finance. Content The Single Honours Accounting degree comprises compulsory modules together with optional modules available in the School. The compulsory modules are: Year 1 Accounting Information Systems Economics 1 Introduction to Legal Study and Basic Contract Law Introductory Accounting 1 Introductory Accounting 2 Statistical Methods Year 2 Financial Accounting Financial Decision-making Financial Market Theory Management Accounting Managerial Behaviour Year 3 Advanced Financial Accounting Advanced Management Accounting Auditing and Accountability Law of Business Organisations Taxation Students studying Accounting with a Modern Language substitute two core language modules each year for some of those above. For details of the Economics and Accounting degree, please see the Economics entry on page 92. UNDERGRADUATE PROSPECTUS 2014 | Queen’s University Belfast | Q75 QBELF50 A Accounting Entrance Requirements Accounting A-level: AAB/AAA + GCSE Mathematics grade B. Accounting with a Modern Language A-level: AAB/AAA + GCSE Mathematics grade B. For French option: normally A-level French or AS-level French grade B. For Spanish option: normally A-level Spanish or AS-level Spanish grade B or GCSE Spanish grade B or evide

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