island shanhab age choros increase cv nhabitat area erosion sedimentation delta Baltrum 2.166304394 2000 121.227 0.352492192 6.140451 17 7.1 -3.78 3.513 7.293 Borkum 2.232380599 2000 663 3.780989217 29.2133 17 38.9 -25.5 27.986 53.486 Juist 1.9773484 2000 311.27 2.000876505 20.28379 17 18.3 -5.434 5.575 11.009 Langeoog 2.437435389 2000 381.531 4.849833359 36.41945 17 22.4 -3.728 5.513 9.241 Luetje.Hoern 1.015010469 500 0.484 0.803448743 66.51107 4 0.1 -0.45 1.433 1.883 Mellum 1.526316947 120 74.085 5.968807858 58.69471 15 4.9 -2.48 3.519 5.999 Memmert 1.559149372 120 69.2 5.388518457 58.41437 16 5.17 -6.264 5.071 11.335 Norderney 2.349224867 2000 469.115 4.736475974 36.16282 17 27.6 -0.469 0.647 1.116 Spiekeroog 2.119831434 2000 347.106 7.405301602 54.78692 17 20.4 -2.447 2.934 5.381 Wangerooge 2.162524891 2000 167.127 1.309580547 12.32546 17 9.8 -2.561 7.2 9.761