Science Facing Aliens - Invasive Alien Species in Belgium - Belgian ...

Recommendations

Info

78 The non-indigenous species list The discovery of America (1492) is set as the historical baseline for this assessment. This year marked the beginning of a strong increase in trans-Atlantic shipping. Associated with shipping, an increase in commerce between continents, their cultures and species evolved. Shipping and commerce are two important vectors for the ‘transport’ of non-endemic species. Species that arrived after 1492 in our waters are classified as non-endemic or alien. Those for which information indicates that resident populations existed before this reference year are considered as endemic. The list strives to include all currently known non-indigenous and cryptogenic species registered in salty and brackish environments in the Belgian part of the North Sea, the Belgian coastal zone and adjacent estuaries of the rivers Yser and Scheldt (see figure 1). The Ostend Sluice dock, an artificial water body connected to the port docks of Ostend, is also part of the study area. The initiative of the VLIZ Alien Species Consortium scrutinizes intentional and unintentional introductions by man or other vectors. Alien species for which there is no evidence of resident populations are not included in the list, nor are species that are limited to the fresh water environment. Vagrant species or occasional observations therefore are not part of the scope. New arrivals as a consequence of naturally induced migrations are also excluded. To this purpose the possible effects of global warming are not accounted for in the list. Figure 3: map of the study area The trend in the number of observed non-endemic species in the Belgian part of the North Sea and adjacent estuaries is on the rise (figure 2). The steep increase from the 1980’s onwards is largely due to an increased and improved observation effort. Therefore data before 1980 can not be compared to data after 1980. Currently (May 2009), the list contains 64 resident non-endemic species. Figure 3 shows the distribution of these resident non-endemic species by larger groups. The arthropods count the highest number of non-endemic species (23). In this group, the share of Cirripedia (barnacles) is significant (5). Molluscs (i.a. bivalves and gastropods) and algae contribute with respectively 11 and 10 species.
70 60 50 40 30 20 10 0 cumulative # of first observations # first observations
Page 1:
Science Facing Aliens Proceedings o
Page 4 and 5:
Segers, H & E. Branquart (Eds). Sci
Page 7 and 8:
Welcome to the World? Non-native br
Page 9 and 10:
these geese species exchange betwee
Page 11:
References Anselin A., Geers V. & K
Page 14 and 15:
8 variables, hydro-morphological ch
Page 16 and 17:
10 References Bollache, L., Devin,
Page 18 and 19:
12 Figure 1 - USDA hardiness zones
Page 20 and 21:
14 40 35 30 25 20 15 10 5 0 # of bl
Page 22 and 23:
16 Appendix - List of non-native sp
Page 25 and 26:
Impact of Fallopia spp. on ecosyste
Page 27 and 28:
thermophilous grassland species. Ba
Page 29 and 30:
Soil-dependent growth strategy of i
Page 31 and 32:
Nr. of flowers/plant 3.0 2.5 2.0 1.
Page 33 and 34: Detection of intraguild predation b
Page 35 and 36: Adaline (µg) ± S.E. 2.50 2.00 1.5
Page 37 and 38: Measuring the impact of Harmonia ax
Page 39 and 40: Unidentified (9/20) Propylea 14-pun
Page 41 and 42: Comparing Fallopia japonica, F. sac
Page 43 and 44: SLA (m²/kg) 30 25 20 15 10 5 0 SLA
Page 45 and 46: Mediterranean container plants and
Page 47 and 48: All species from our survey have in
Page 49 and 50: dangers of uncritically using the t
Page 51 and 52: Water frogs in Wallonia: genetic id
Page 53 and 54: • the distinction between the nat
Page 55: References Berger, L., 1988. On the
Page 58 and 59: 52 # crabs fyke -1 day -1 150 100 5
Page 60 and 61: 54 Ring-necked parakeets in Belgium
Page 62 and 63: 56 Our models predict a mean number
Page 64 and 65: 58 Strubbe D. & Matthysen E., 2009c
Page 66 and 67: 60 Study area & data collection Lie
Page 68 and 69: 62 cm) and age of the tree and comp
Page 71 and 72: Soil arthropods associated to the i
Page 73 and 74: Table 1. Abundance of soil fauna ex
Page 75: References Armbrecht I., Perfecto I
Page 78 and 79: 72 Status of non-indigenous fish sp
Page 80 and 81: 74 Trends At 487 site-specific surv
Page 83: Non-indigenous species of the Belgi
Page 87 and 88: Brussels Psittacidae: impacts, risk
Page 89: References Anonymous 2005. UK non-n
Page 92 and 93: 86 country, by calculating the numb
Page 94 and 95: 88 raised awareness on the importan
Page 96 and 97: 90 Table 1 - Presentation of the di
Page 99: Science Facing Aliens Proceedings o
show all

Science Facing Aliens - Invasive Alien Species in Belgium - Belgian ...

Create successful ePaper yourself

Delete template?

Save as template?