Pollinator diversity in Mango (Mangifera indica L.) across GKVK campus: an overview

Pollinator diversity in Mango (Mangifera indica L.) across GKVK campus: an overview
Author: Mahesh Joshi
Publisher: Prem Jose
Total Pages:
Release:
Genre: Reference
ISBN:

Flower initiation in mango (var: “Mallika”) commenced at 21.83 ± 1.58 days after bud development and staminate : hermaphrodite flower ratio was 1:0.29. In each flower, one fertile and four staminoids were present. Staminate and hermaphrodite flowers opened during 0730-1000 hrs. and 0800-1100 hrs. and in them anther dehiscence occurred at 27.1 ± 3.1 and 29.3 ± 4.8 min. after anthesis, respectively. Fruit set (no./panicle) was 2.90 ±1.27 in unbagged and zero in bagged inflorescence. Total longevity of each flower was 81.96 ± 2.14 hrs. Forty five insect species found foraging on the inflorescence belonged to Hymenoptera (60%), Diptera (24.44%), Hemiptera (6.67%), Coleoptera (4.44%) and Lepidoptera (4.44%). Shannon-Weiner Diversity Index (H) values ranged from 1.201-1.586 during different hours of the day, with peak ‘H’ values during 0900-1100 hrs. (1.597-1.619). Highest ‘H’ value (1.551) was recorded at >90 per cent flowering stage. Berger-Parker index (d) for dominance during 25, 50, 75 and >90 percent flowering was highest for E. obliquus (d=0.40, 0.40, 0.36 and 0.34). E. obliquus, Chrysomya sp., A. florea and A. cerana indica spent 11.83, 8.33, 5.29 and 3.76 sec. on each flower, respectively. All four species spent maximum foraging time during 1000-1100 hrs. E. obliquus, Chrysomya sp., A. florea and A. cerana indica visited 36.38, 42.93, 57.33 and 69.40 flowers /5 min., respectively. Maximum bee visitation was recorded at 0600-0700 hrs. and 1700-1800 hrs. Further, E. obliquus, Chrysomya sp., A. florea and A. cerana indica visited 13.03, 18.18, 27.84 and 31.78 flowers per inflorescence. Significant negative correlation (p=0.001) was observed between the number of flowers visited per inflorescence and time spent w.r.t. all the four species.

Biodiversity of the Himalaya: Jammu and Kashmir State

Biodiversity of the Himalaya: Jammu and Kashmir State
Author: Ghulam Hassan Dar
Publisher: Springer Nature
Total Pages: 1100
Release: 2020-02-26
Genre: Science
ISBN: 9813291745

The Himalaya, a global biodiversity hotspot, sustains about one-fifth of the humankind. Nestled within the north-western mountain ranges of the Himalaya, the Jammu and Kashmir (J&K) State harbours more than half of the biodiversity found in the Indian Himalaya. The wide expanse of State, spread across the subtropical Jammu, through the temperate Kashmir valley, to the cold arid Ladakh, is typical representative of the extensive elevational and topographical diversity encountered in the entire Himalaya. This book, the most comprehensive and updated synthesis ever made available on biodiversity of the J&K State, is a valuable addition to the biodiversity literature with global and regional relevance. The book, arranged into 7 parts, comprises of 42 chapters contributed by 87 researchers, each of whom is an expert in his/her own field of research. The precious baseline data contained in the book would form the foundation for assessing current status of knowledge about the bioresources, identify the knowledge gaps, and help prioritization of conservation strategies to steer the sustainable use of biodiversity in this Himalayan region. Given the breadth of topics covered under the banner of biodiversity in this book, it can surely serve as a model for documentation of biodiversity in other regions of the world. The book will be of immense value to all those who, directly or indirectly, have to deal with biodiversity, including students, teachers, researchers, naturalists, environmentalists, resource managers, planners, government agencies, NGOs and the general public at large.