±±¾©Ê¯ÓÍ»¯¹¤Ñ§Ôº2026ÄêÑо¿ÉúÕÐÉú½ÓÊÕµ÷¼Á¹«¸æ
²é¿´: 206  |  »Ø¸´: 3
µ±Ç°Ö÷ÌâÒѾ­´æµµ¡£

phytolith

Òø³æ (СÓÐÃûÆø)

[½»Á÷] ½ô¼±ÇóÖú·­Ò루¸¹×ã¿ÇÌåÀࣩ

Morphometrics of gastropod shells: In order to describe and discriminate ecophenotypes or species of Radix and Bellamya with the aid of shell characters the morphometric analyses will be conducted using frontal view images described by 5 landmarks and 19 sliding semi-landmarks. The landmarks (repeatability assessment) will be digitised using tpsDIG software (Rohlf 1998). Shape coordinates will be computed using generalised Procrustes (least squares) superimposition (GPA) ( in tpsRWA software. From the 24 GPA aligned landmarks and semi-landmarks the uniform (alfa = 0) and non-uniform (partial warps) components will be computed using thin-plate spline and used together for statistical comparisons of shape variation within and among populations. Shape variables (partial warps) and uniform shape components will be computed . Closeness of tangent shape space to the curved shape space will assessed by comparing Procrustes distances in the shape space to Euclidean distance in the tangent space. Shape variation and shape variables can be analysed using conventional multivariate statistical techniques. Discontinuities of shape variation among and within the samples (presence of more than one putative species) will be analysed and usefulness of the semi-landmark approach to identify potential taxonomic characters assessed.

» ²ÂÄãϲ»¶

ÕùÊDz»Õù£¬²»ÕùÊÇÕù£¬ÎÞΪ¶ø²»Õù£¬ÌìÏÂĪÄÜÓëÖ®Õù¡£
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

ÓÄÑŰٺÏ

Òø³æ (СÓÐÃûÆø)

¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï
phytolith(½ð±Ò+20,VIP+0):лл£¬¾¡¹ÜÒѾ­´í¹ýÁËÍê¸åʱ¼ä£¬»¹ÎªÄãµÄŬÁ¦±íʾ¸Ðл£¡Ï£Íû³ÉΪÄãµÄÅóÓÑ¡£ 6-15 09:42
¸¹×ã¿ÇÌåÀàµÄÐÎ̬·ÖÎö·¨£ºÎªÁ˽èÖúÓÚ¿ÇÌåÀදÎïµÄÌØÕ÷ÃèÊöºÍÇø·Ö»·ÀâÂݺÍÂܲ·ÂݵÄÉú̬±íÐͺÍÎïÖÖ£¬¿ÉÒÔÔËÓÃ5¸ö½ç±êºÍ19¸ö»¬Òưë½ç±êÃèÊöµÄÕýÃæÍ¼Ïñ½øÐÐÐÎ̬²âÁ¿Ñ§µÄ·ÖÎö¡£Ê¹ÓÃtpsDIGÈí¼þ£¨Rohlf 1998£©¿É½«ÕâЩ½ç±êÊý×Ö»¯¡£ÐÎ×´×ø±ê¿ÉÓÉÕûÌåµÄÆÕÊϵþºÏ·ÖÎö·¨£¨GPA£©¼ÆËã³öÀ´¡£ÔÚtpsRWAÈí¼þÖУ¬´ÓµÚ24¸öÓÃGPA·¨Ê¹³ÉÒ»ÏߵĽç±êºÍ°ë½ç±ê¿ªÊ¼£¬ÔÚͬһֱÏßÉÏ£¨alfa = 0£©ºÍ²»ÔÚÒ»ÌõÖ±ÏßÉÏ£¨¾Ö²¿ÍäÇú£©µÄµã¶¼¿ÉÒÔÓñ¡°å·ÂÑù·ÖÎö·¨¼ÆËã³öÀ´,½«ÉÏÊöÁ½ÖÖ·½·¨×ÛºÏʹÓÃÒÔÔÚÖÖȺÄÚ¼°ÖÖȺ¼ä¶ÔÐÎ×´µÄ±ä»¯½øÐÐͳ¼ÆÑ§µÄ±È½Ï¡£ÐÎ×´µÄ±ä»¯²¿·Ö£¨Ö±ÏßµÄÍäÇú²¿·Ö£©ÒÔ¼°²»±äµÄ²¿·Ö¶¼¿ÉÒÔ¼ÆËã³öÀ´¡£ÇÐÏßÐÎ×´¿Õ¼äÓëÍäÇúÐÎ×´¿Õ¼äµÄµÄÏàËÆ¶È¿ÉÒÔͨ¹ý±È½ÏÐÎ×´¿Õ¼äµÄProcrustes¾àÀëÓëÇÐÏ߿ռäµÄEuclidean¾àÀë¹ÀËã³öÀ´¡£ÐÎ×´µÄ±ä»¯³Ì¶È¼°ÐÎ×´±äÁ¿¿ÉÒÔͨ¹ý´«Í³µÄ¶à±äÁ¿Í³¼ÆÑ§¼¼Êõ½øÐзÖÎö¡£¶ÔÑù±¾Ö®¼äºÍÑù±¾ÄÚ²¿ÐÎ×´±ä»¯µÄ²»Á¬ÐøÐÔ£¨¼´³öÏÖ²»Ö¹Ò»¸öµÄ¼ÙÏëÎïÖÖ£©½øÐÐÁË·ÖÎö£¬²¢ÇÒ¶Ô°ë½ç±ê·¨ÔÚ¼ø¶¨Ç±ÔڵķÖÀàÌØÕ÷·½ÃæµÄÓÐÓÃÐÔ½øÐÐÁËÆÀ¹À¡£
ÄãÕâÎÄÕÂ̫רҵÁË£¬·­µÃÈËÍ·¶¼´óÁË¡£±¾È˶ÔÄãµÄרҵһÇϲ»Í¨£¬¹À¼Æ·­ÒëµÄÓв»×¼È·µÄµØ·½£¬Äã¶Ô±ÈÔ­ÎÄ×Ô¼ºÔٺúÿ´¿´°É¡£Ï£Íû»á¶ÔÄãÓÐËù°ïÖú¡£
2Â¥2009-06-14 12:56:52
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

ÓÄÑŰٺÏ

Òø³æ (СÓÐÃûÆø)

ÎÒËÀÁ˺öàÄÔϸ°û²Å·­³ÉÕâÑù×ӵģ¬Â¥Ö÷¸Ï½ôÀ´¿´¿´°¡£¡
3Â¥2009-06-14 17:33:31
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

phytolith

Òø³æ (СÓÐÃûÆø)

ÇóÖú½áÊø

±¾ÇóÖúÒÑÓÐÂúÒâ»ØÌû£¬½áÊøÇóÖú¡£¸Ðл³æÓÑ£¡
ÕùÊDz»Õù£¬²»ÕùÊÇÕù£¬ÎÞΪ¶ø²»Õù£¬ÌìÏÂĪÄÜÓëÖ®Õù¡£
4Â¥2009-06-15 09:49:05
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ phytolith µÄÖ÷Ìâ¸üÐÂ
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] ÉúÎïÓëÒ½Ò©µ÷¼Á +4 Ê®Æßsa 2026-04-05 4/200 2026-04-05 20:05 by lys0704
[¿¼ÑÐ] Çóµ÷¼Á +13 111623 2026-04-04 15/750 2026-04-05 19:42 by Öì³ÉÓñ2017
[¿¼ÑÐ] Ò»Ö¾Ô¸Çà¿Æ085500£¬³õÊÔ295·Ö£¬¹«¹²¿Î213·Ö +3 Óöµ½µÄÈËÔ¸Íû¶¼Ä 2026-04-05 3/150 2026-04-05 18:45 by À¶ÔÆË¼Óê
[¿¼ÑÐ] 298·Ö 070300Çóµ÷¼Á +15 zwen03 2026-04-02 15/750 2026-04-05 12:52 by Hdyxbekcb
[¿¼ÑÐ] 0703»¯Ñ§ +12 ÄÝÄÝninicgb 2026-04-04 13/650 2026-04-05 10:46 by °¡¿¡£¡
[¿¼ÑÐ] 292·Ö£¬²ÄÁÏÓ뻯¹¤£¬ÉêÇëµ÷¼Á +22 ³ÌÇçÖ® 2026-04-01 26/1300 2026-04-04 22:03 by hemengdong
[¿¼ÑÐ] 0703Çóµ÷¼Á383·Ö +8 W55j 2026-04-03 8/400 2026-04-04 20:09 by xhai2011
[¿¼ÑÐ] 331Çóµ÷¼Á +3 niby 2026-04-02 3/150 2026-04-04 19:56 by À¶ÔÆË¼Óê
[¿¼ÑÐ] Ò»Ö¾Ô¸±±½»´ó²ÄÁϹ¤³Ì×Ü·Ö358 +6 cs0106 2026-04-03 6/300 2026-04-04 11:20 by w_xuqing
[¿¼ÑÐ] Ò»Ö¾Ô¸ÖйúʯÓÍ´óѧ»¯Ñ§¹¤³Ì323·ÖÇóµ÷¼Á +4 »¯¹¤×¨Ë¶323·Ö 2026-04-03 6/300 2026-04-03 22:12 by dongzh2009
[¿¼ÑÐ] Çóµ÷¼Á +9 akdhjs 2026-03-31 11/550 2026-04-03 13:32 by akdhjs
[¿¼ÑÐ] 313Çóµ÷¼Á +3 ¡«Î¢Î¢Á¹¡« 2026-04-03 3/150 2026-04-03 11:25 by à£à£à£0119
[¿¼ÑÐ] 312Çóµ÷¼Á +6 ССī123 2026-04-02 7/350 2026-04-03 07:32 by jsw79
[¿¼ÑÐ] 372Çóµ÷¼Á +3 jjÓ¿77 2026-04-02 3/150 2026-04-02 09:57 by olim
[¿¼ÑÐ] ÉúÎïѧ327£¬Çóµ÷¼Á +5 ÊéÉϵÄ÷×Ó 2026-04-01 6/300 2026-04-02 06:47 by ilovexiaobin
[¿¼ÑÐ] 379Çóµ÷¼Á +3 ?¿à¹Ï²»¿à 2026-04-01 3/150 2026-04-01 20:09 by ÄºÔÆÇ庮
[¿¼ÑÐ] 339Çóµ÷¼Á +5 zjjkt 2026-03-31 5/250 2026-04-01 09:18 by JourneyLucky
[¿¼ÑÐ] 085404 22408 315·Ö +5 zhuangyan123 2026-03-31 6/300 2026-03-31 13:48 by limeifeng
[¿¼ÑÐ] Ò»Ö¾Ô¸Õã½­´óѧ¹¤¿Æ¶¯Á¦¹¤³Ì370,ÊýÒ»121,רҵ¿Î135£¬ÏÖÔÚÄÜÈ¥ÄÄÀï +3 080700µ÷¼Á 2026-03-30 4/200 2026-03-31 12:00 by KLMY666
[¿¼ÑÐ] 262Çóµ÷¼Á +7 ZZ..000 2026-03-30 8/400 2026-03-31 10:05 by cal0306
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û